Gr 9 NATURAL SCIENCES: Term Test 2
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Questions and Answers

What is a common characteristic of elements in the same group?

  • Different electron configurations
  • Similar physical and chemical properties (correct)
  • Different atomic numbers
  • Similar atomic masses

What is the purpose of a chemical formula?

  • To indicate the position of an element in the Periodic Table
  • To show the melting point of a substance
  • To indicate the type of chemical bond
  • To represent the composition of a compound (correct)

What is the product of the reaction between lithium and water?

  • Lithium chloride and chlorine
  • Lithium nitrate and nitrogen
  • Lithium hydroxide and hydrogen gas (correct)
  • Lithium oxide and oxygen

What is the significance of subscripts in a chemical formula?

<p>They show the number of each type of atom in a molecule (B)</p> Signup and view all the answers

What is the purpose of the IUPAC naming system?

<p>To standardize the names of compounds (B)</p> Signup and view all the answers

What is the suffix used in the IUPAC naming system for compounds containing a metal and a non-metal?

<p>-ide (B)</p> Signup and view all the answers

What is the main difference between water (Hâ‚‚O) and hydrogen peroxide (Hâ‚‚Oâ‚‚)?

<p>The ratio of hydrogen to oxygen atoms (C)</p> Signup and view all the answers

What is the organization principle of the Periodic Table?

<p>Increasing atomic number (D)</p> Signup and view all the answers

What is the rule used in the IUPAC naming system for compounds containing only non-metals?

<p>Both Element Position Rule and Prefix Rule (B)</p> Signup and view all the answers

What is the prefix used in the IUPAC naming system to indicate one atom of an element?

<p>Mono- (A)</p> Signup and view all the answers

What is the role of Dmitri Mendeleev in the development of the Periodic Table?

<p>He proposed the original version of the Periodic Table (B)</p> Signup and view all the answers

What is the characteristic of metals based on their position on the Periodic Table?

<p>Found on the left-hand side (D)</p> Signup and view all the answers

What is the correct IUPAC name for the compound CO?

<p>Carbon monoxide (B)</p> Signup and view all the answers

What is the correct IUPAC name for the compound NaCl?

<p>Sodium chloride (C)</p> Signup and view all the answers

What information is typically included on a tile on the Periodic Table?

<p>Chemical symbol, atomic number, and atomic mass (B)</p> Signup and view all the answers

What is the correct IUPAC name for the compound SO₃?

<p>Sulfur trioxide (A)</p> Signup and view all the answers

What is the significance of the periodic table?

<p>It organizes all known elements in a systematic way (A)</p> Signup and view all the answers

What is the purpose of prefixes in the IUPAC naming system?

<p>To indicate the number of atoms of an element (B)</p> Signup and view all the answers

What determines the classification of an element as a metal, non-metal, or semi-metal?

<p>Its position on the Periodic Table (B)</p> Signup and view all the answers

What is a characteristic of chemical symbols?

<p>They are usually the first one or two letters of the element's name (A)</p> Signup and view all the answers

What is the chemical formula for sulfur dioxide?

<p>SOâ‚‚ (B)</p> Signup and view all the answers

What level of representation involves imagining or visualizing the particles that make up substances?

<p>Submicroscopic Level (D)</p> Signup and view all the answers

What is the term for the force that holds atoms together in a molecule or compound?

<p>Bond (B)</p> Signup and view all the answers

What is the chemical formula for lithium fluoride?

<p>LiF (A)</p> Signup and view all the answers

What level of representation uses chemical symbols and formulae to represent substances?

<p>Symbolic Level (D)</p> Signup and view all the answers

What is the term for a substance that undergoes change during a chemical reaction?

<p>Reactant (B)</p> Signup and view all the answers

What is the chemical formula for iron sulfide?

<p>FeS (A)</p> Signup and view all the answers

What is the term for a process in which substances are transformed into different substances through the breaking and forming of bonds?

<p>Chemical Reaction (D)</p> Signup and view all the answers

What level of representation involves observing substances and their changes with our senses?

<p>Macroscopic Level (B)</p> Signup and view all the answers

What is the chemical formula for dinitrogen tetroxide?

<p>Nâ‚‚Oâ‚„ (B)</p> Signup and view all the answers

What is tarnish?

<p>A chemical reaction involving oxygen or sulfur (B)</p> Signup and view all the answers

What is a balanced equation?

<p>An equation with an equal number of atoms on both sides (A)</p> Signup and view all the answers

What is the rule for balancing equations?

<p>Change only the coefficients in front of chemical formulas (A)</p> Signup and view all the answers

What is combustion?

<p>A type of chemical reaction that releases energy (B)</p> Signup and view all the answers

Why is steel wool used in demonstrations of iron reacting with oxygen?

<p>Because it has a large surface area, making the reaction more visible (C)</p> Signup and view all the answers

What is observed when iron or steel wool burns?

<p>Bright orange sparks (B)</p> Signup and view all the answers

What is the name of the device used to demonstrate the reaction of iron with oxygen?

<p>Bunsen burner (C)</p> Signup and view all the answers

What is the purpose of counting atoms in a chemical equation?

<p>To balance the equation (A)</p> Signup and view all the answers

What is the result of balancing a chemical equation?

<p>The number and type of atoms are the same on both sides (A)</p> Signup and view all the answers

Why is it important to balance chemical equations?

<p>To ensure that the number and type of atoms are the same on both sides (C)</p> Signup and view all the answers

What does a chemical equation represent?

<p>A symbolic representation of a chemical reaction using chemical formulae (D)</p> Signup and view all the answers

What is the role of a coefficient in a chemical equation?

<p>To indicate the number of molecules or atoms involved (D)</p> Signup and view all the answers

What is the purpose of a subscript in a chemical formula?

<p>To indicate the number of atoms of that element in a molecule (A)</p> Signup and view all the answers

What are the key components of a chemical reaction?

<p>Reactants and products (B)</p> Signup and view all the answers

What is the difference between a word equation and a picture equation?

<p>A word equation represents reactants and products using names, while a picture equation uses submicroscopic diagrams (D)</p> Signup and view all the answers

What is the importance of balancing a chemical equation?

<p>To ensure the number of atoms of each element is the same on both sides of the equation (C)</p> Signup and view all the answers

What is the product of the reaction between hydrogen and oxygen?

<p>Water (A)</p> Signup and view all the answers

What is the term for iron oxide, formed by the reaction of iron and oxygen?

<p>Rust (B)</p> Signup and view all the answers

What is a chemical equation?

<p>A symbolic representation of a chemical reaction using chemical formulae (A)</p> Signup and view all the answers

What is the purpose of a picture equation?

<p>To visually represent a chemical reaction using submicroscopic diagrams (C)</p> Signup and view all the answers

What is the general word equation for the reaction of metals with oxygen?

<p>metal + oxygen → metal oxide (D)</p> Signup and view all the answers

What is formed when magnesium reacts with oxygen?

<p>magnesium oxide (A)</p> Signup and view all the answers

What is the formula for the chemical equation of magnesium reacting with oxygen?

<p>2Mg + O2 → 2MgO (B)</p> Signup and view all the answers

What is the term for the substances that start a chemical reaction?

<p>reactants (A)</p> Signup and view all the answers

What is the formula for the chemical equation of calcium reacting with oxygen?

<p>2Ca + O2 → 2CaO (B)</p> Signup and view all the answers

What is the formula for the chemical equation of iron reacting with oxygen?

<p>4Fe + 3O2 → 2Fe2O3 (D)</p> Signup and view all the answers

What is the term for the flaky, crusty, reddish-brown product that forms on iron when it reacts with oxygen?

<p>rust (C)</p> Signup and view all the answers

What is the process of rust formation?

<p>slow corrosion (C)</p> Signup and view all the answers

What is the term for materials or coatings that prevent or slow down the formation of rust?

<p>rust-resistant (B)</p> Signup and view all the answers

What is the alloy made primarily of iron and carbon known for its strength and used in construction and manufacturing?

<p>steel (A)</p> Signup and view all the answers

What is the primary component of rust?

<p>Iron oxide (Fe₂O₃) (A)</p> Signup and view all the answers

What is the result of the reaction between iron, oxygen, and water?

<p>Hydrated iron oxide (rust) (A)</p> Signup and view all the answers

What is a factor that accelerates rust formation?

<p>Moisture (D)</p> Signup and view all the answers

Why are materials like wood or aluminum preferred over iron or steel in coastal areas?

<p>They do not rust (D)</p> Signup and view all the answers

What is a problem associated with rust?

<p>It degrades the structural integrity and appearance of metal objects (A)</p> Signup and view all the answers

What is a method of protecting iron and steel from rusting?

<p>Applying a coating of paint or oil (D)</p> Signup and view all the answers

What is the purpose of galvanization?

<p>To provide a protective barrier against rusting (A)</p> Signup and view all the answers

Why is stainless steel resistant to rust?

<p>It is mixed with other elements, such as chromium (C)</p> Signup and view all the answers

What is the purpose of protective coatings?

<p>To prevent moisture and oxygen from reaching the metal surface (B)</p> Signup and view all the answers

Why does rust form when iron or steel comes into contact with oxygen?

<p>Because iron reacts with oxygen to form iron oxide (C)</p> Signup and view all the answers

What is a common method used to prevent rusting of iron?

<p>All of the above (D)</p> Signup and view all the answers

What happens to the metal when paint peels off?

<p>It is exposed to oxygen and can rust (C)</p> Signup and view all the answers

What is the reaction that occurs when zinc reacts with oxygen?

<p>2Zn + O2 → 2ZnO (A)</p> Signup and view all the answers

What is a common application of galvanised products?

<p>Construction and household items (B)</p> Signup and view all the answers

What accelerates rusting?

<p>Moist or corrosive environments (A)</p> Signup and view all the answers

What is the general word equation for the reaction of non-metals with oxygen?

<p>Non-metal + oxygen → non-metal oxide (B)</p> Signup and view all the answers

What is the product of the reaction between carbon and oxygen?

<p>Carbon dioxide (A)</p> Signup and view all the answers

What is the chemical equation for the reaction between carbon and oxygen?

<p>C + O2 → CO2 (A)</p> Signup and view all the answers

What is the purpose of applying a layer of chromium to iron?

<p>To protect it from rusting (D)</p> Signup and view all the answers

What is the term for the compounds formed when non-metals react with oxygen?

<p>Non-metal oxides (A)</p> Signup and view all the answers

What is the product of the reaction between sulfur and oxygen?

<p>Sulfur dioxide (B)</p> Signup and view all the answers

What is used to preserve dried fruits such as apricots and peaches?

<p>Sulfur dioxide (B)</p> Signup and view all the answers

What is the chemical equation for the reaction of phosphorus with oxygen?

<p>4P + 5O2 → 2P2O5 (C)</p> Signup and view all the answers

What is formed when hydrogen reacts explosively with oxygen?

<p>Water (B)</p> Signup and view all the answers

What is the word equation for the reaction of sulfur with oxygen?

<p>Sulfur + oxygen → sulfur dioxide (C)</p> Signup and view all the answers

What is the name of the oxide formed when phosphorus reacts with oxygen?

<p>Phosphorus pentoxide (B)</p> Signup and view all the answers

What is the purpose of sulfur dioxide in wine production?

<p>To preserve the quality of the wine (A)</p> Signup and view all the answers

What is the general equation for non-metal reactions with oxygen?

<p>Non-metal + oxygen → non-metal oxide (A)</p> Signup and view all the answers

What is the hazard associated with sulfur mining?

<p>Inhalation of sulfur dioxide gas (C)</p> Signup and view all the answers

What is the characteristic of sulfur dioxide?

<p>It is a toxic gas (C)</p> Signup and view all the answers

What is a compound made up of?

<p>Two or more different kinds of atoms (B)</p> Signup and view all the answers

What is a molecule?

<p>A cluster of atoms that are bonded together in a specific manner (B)</p> Signup and view all the answers

What is a characteristic of crystal lattices?

<p>Atoms are arranged in a regular, repeating pattern (B)</p> Signup and view all the answers

What is an element?

<p>A substance made up of only one kind of atom (C)</p> Signup and view all the answers

What is a diatomic molecule?

<p>A molecule made up of two atoms of the same element (D)</p> Signup and view all the answers

What determines the unique properties of a compound?

<p>The fixed ratio of atoms in the compound (B)</p> Signup and view all the answers

What is the smallest repeating unit that represents the compound's composition?

<p>Formula unit (B)</p> Signup and view all the answers

What is true about the ratio of atoms in a compound?

<p>The ratio of atoms is fixed and unique to each compound (D)</p> Signup and view all the answers

What is the product of the combustion reaction of iron?

<p>Iron(III) oxide (D)</p> Signup and view all the answers

What is the reactant in the combustion reaction of magnesium?

<p>Magnesium metal strip (C)</p> Signup and view all the answers

What type of reaction is the combustion of magnesium?

<p>Exothermic reaction (A)</p> Signup and view all the answers

What is the symbolic representation of the combustion reaction of magnesium?

<p>2Mg + O₂ → 2MgO (B)</p> Signup and view all the answers

Why do fine steel threads increase the surface area for the combustion reaction of iron?

<p>Because they increase the surface area for the reaction (A)</p> Signup and view all the answers

What is the historical use of magnesium powder?

<p>In early camera flashes (D)</p> Signup and view all the answers

What is the observation when magnesium ignites?

<p>It produces a bright white flame (B)</p> Signup and view all the answers

What is the energy change observed during the combustion reaction of magnesium?

<p>The reaction releases energy (C)</p> Signup and view all the answers

What is the product of the combustion reaction of magnesium in air?

<p>Magnesium oxide (A)</p> Signup and view all the answers

What is the importance of safety precautions during demonstrations of combustion reactions?

<p>To prevent intense heat and light (B)</p> Signup and view all the answers

What is the product of the reaction between carbon and oxygen?

<p>Carbon dioxide (A)</p> Signup and view all the answers

What type of reaction occurs when carbon burns in oxygen?

<p>Combustion reaction (A)</p> Signup and view all the answers

What is the chemical equation for the reaction of sulfur with oxygen?

<p>S + O2 → SO2 (A)</p> Signup and view all the answers

What is the importance of understanding the reaction of carbon with oxygen?

<p>It has implications for global climate change. (B)</p> Signup and view all the answers

What is the visual representation of the reaction of carbon with oxygen?

<p>A submicroscopic representation of the reaction (D)</p> Signup and view all the answers

What is the reactant in the reaction of phosphorus with oxygen?

<p>Phosphorus (D)</p> Signup and view all the answers

What is the product of the reaction of phosphorus with oxygen?

<p>Phosphorus pentoxide (B)</p> Signup and view all the answers

What is the characteristic of sulfur?

<p>It is a yellow non-metal. (A)</p> Signup and view all the answers

Why is the combustion of carbon important?

<p>It is a major source of energy for electricity generation. (C)</p> Signup and view all the answers

What is the chemical equation for the reaction of carbon with oxygen?

<p>C + O2 → CO2 (C)</p> Signup and view all the answers

What is the purpose of a coefficient in a chemical equation?

<p>To indicate the number of molecules or atoms involved in a reaction (B)</p> Signup and view all the answers

What type of equation represents a chemical reaction using the names of the reactants and products?

<p>Word equation (A)</p> Signup and view all the answers

What is the term for a substance that undergoes change during a chemical reaction?

<p>Reactant (C)</p> Signup and view all the answers

What is the purpose of balancing a chemical equation?

<p>To accurately represent the conservation of mass (B)</p> Signup and view all the answers

What is the term for iron oxide, formed by the reaction of iron and oxygen?

<p>Rust (C)</p> Signup and view all the answers

What type of equation uses submicroscopic diagrams to visually represent the reactants and products?

<p>Picture equation (B)</p> Signup and view all the answers

What is the purpose of a subscript in a chemical formula?

<p>To indicate the number of atoms of an element in a molecule (C)</p> Signup and view all the answers

What is the result of balancing a chemical equation?

<p>The number of atoms of each element is the same on both sides of the equation (A)</p> Signup and view all the answers

What is the term for a process in which substances are transformed into different substances through the breaking and forming of bonds?

<p>Chemical reaction (C)</p> Signup and view all the answers

What type of equation accurately represents the conservation of mass?

<p>Balanced equation (C)</p> Signup and view all the answers

Which alkali metal reacts explosively with water to form potassium hydroxide and hydrogen gas?

<p>Potassium (B)</p> Signup and view all the answers

What is the IUPAC name for the compound CO?

<p>Carbon monoxide (A)</p> Signup and view all the answers

What is the prefix used to indicate two atoms of an element in the IUPAC naming system?

<p>di- (D)</p> Signup and view all the answers

What is the name of the system developed by the International Union of Pure and Applied Chemistry to standardize compound names?

<p>IUPAC naming system (A)</p> Signup and view all the answers

What is the type of compound that is named by listing the metal first, followed by the non-metal with the suffix '-ide'?

<p>Compound containing a metal and a non-metal (D)</p> Signup and view all the answers

What is the correct IUPAC name for the compound LiF?

<p>Lithium fluoride (A)</p> Signup and view all the answers

What is the rule used in the IUPAC naming system for compounds containing only non-metals, where the element further to the left on the Periodic Table is named first?

<p>Element position rule (A)</p> Signup and view all the answers

What is the chemical formula for iron sulfide?

<p>FeS (A)</p> Signup and view all the answers

What is the correct IUPAC name for the compound Nâ‚‚Oâ‚„?

<p>Dinitrogen tetroxide (A)</p> Signup and view all the answers

What is the term for the unique name assigned to each compound to avoid confusion and ensure precise communication?

<p>IUPAC name (A)</p> Signup and view all the answers

What is the term for the process in which substances are transformed into different substances through the breaking and forming of chemical bonds?

<p>Chemical reaction (A)</p> Signup and view all the answers

What is the level of representation that involves observing substances and their changes with our senses?

<p>Macroscopic level (D)</p> Signup and view all the answers

What is the term for a substance that undergoes change during a chemical reaction?

<p>Reactant (B)</p> Signup and view all the answers

What is the level of representation that uses chemical symbols and formulae to represent substances?

<p>Symbolic level (B)</p> Signup and view all the answers

What is the term for the force that holds atoms together in a molecule or compound?

<p>Bond (C)</p> Signup and view all the answers

What is the level of representation that involves imagining or visualizing the particles that make up substances?

<p>Submicroscopic level (C)</p> Signup and view all the answers

What is the representation of a substance that uses chemical symbols and formulae?

<p>Symbolic representation (A)</p> Signup and view all the answers

What are the three distinct levels that scientists use to approach understanding chemical reactions?

<p>Macroscopic, submicroscopic, and symbolic (D)</p> Signup and view all the answers

What is the representation of a chemical reaction that uses chemical formulae?

<p>Chemical equation (D)</p> Signup and view all the answers

What is the term for a substance that is formed as a result of a chemical reaction?

<p>Product (C)</p> Signup and view all the answers

What is the difference between a molecule and a crystal lattice?

<p>A molecule is a cluster of atoms bonded together, while a crystal lattice is a regular, repeating pattern of atoms. (D)</p> Signup and view all the answers

What is an element?

<p>A substance made up of only one kind of atom. (A)</p> Signup and view all the answers

What is the characteristic of compounds?

<p>Atoms are combined in a fixed ratio. (B)</p> Signup and view all the answers

What is the smallest repeating unit that represents the composition of a compound?

<p>Formula unit (C)</p> Signup and view all the answers

What is the difference between water (Hâ‚‚O) and hydrogen peroxide (Hâ‚‚Oâ‚‚)?

<p>The ratio of hydrogen to oxygen atoms. (B)</p> Signup and view all the answers

What is the main purpose of balancing a chemical equation?

<p>To ensure that the reactants and products are in the same ratio (D)</p> Signup and view all the answers

What is the result of adding a coefficient to a chemical formula?

<p>Balancing the number of atoms of an element (C)</p> Signup and view all the answers

What is a diatomic molecule?

<p>A molecule made up of two atoms of the same element. (D)</p> Signup and view all the answers

Why is it important to balance chemical equations?

<p>To ensure that the reactants and products are in the same ratio (B)</p> Signup and view all the answers

What is the significance of the fixed ratio in compounds?

<p>It gives the compound its unique properties. (A)</p> Signup and view all the answers

What is the rule for balancing chemical equations?

<p>Change only the coefficients (D)</p> Signup and view all the answers

What is the result of combining atoms in a specific way to form molecules or crystal lattices?

<p>Compounds are formed. (A)</p> Signup and view all the answers

What is the term for the energy released during a combustion reaction?

<p>Exothermic energy (D)</p> Signup and view all the answers

Why is steel wool used in demonstrations of iron reacting with oxygen?

<p>Because it has a large surface area (B)</p> Signup and view all the answers

What is the characteristic of the combustion reaction between iron and oxygen?

<p>It releases energy in the form of light and heat (D)</p> Signup and view all the answers

What is the purpose of counting atoms in a chemical equation?

<p>To balance the number and type of atoms on both sides (D)</p> Signup and view all the answers

What is the definition of a balanced equation?

<p>An equation with the same number and type of atoms on both sides (D)</p> Signup and view all the answers

Why is it important to follow the rules for balancing chemical equations?

<p>To ensure that the reactants and products are in the same ratio (D)</p> Signup and view all the answers

What is the purpose of coating iron with chromium?

<p>To prevent rust (C)</p> Signup and view all the answers

What happens when zinc is scratched?

<p>The underlying zinc can still protect the iron (B)</p> Signup and view all the answers

What is the general word equation for the reaction of a non-metal with oxygen?

<p>non-metal + oxygen → non-metal oxide (A)</p> Signup and view all the answers

What is the chemical equation for the reaction of carbon with oxygen?

<p>C + O2 → CO2 (C)</p> Signup and view all the answers

What is the term for a chemical reaction where a substance reacts with oxygen to produce heat and light?

<p>Combustion reaction (B)</p> Signup and view all the answers

What is the purpose of galvanising iron with zinc?

<p>To protect it from rust (B)</p> Signup and view all the answers

Why does rusting occur faster in environments that are moist or corrosive?

<p>Because the environment accelerates the reaction (C)</p> Signup and view all the answers

What is the product of the reaction between sulfur and oxygen?

<p>Sulfur dioxide (C)</p> Signup and view all the answers

What is the purpose of coating iron with zinc through a process called galvanising?

<p>To make it more durable and resistant to corrosion (C)</p> Signup and view all the answers

What is the characteristic of zinc oxide that makes it an effective protective layer?

<p>It is non-porous (C)</p> Signup and view all the answers

What is the product of the reaction between sulfur and oxygen?

<p>Sulfur dioxide (D)</p> Signup and view all the answers

What is the purpose of sulfur dioxide in dried fruit preservation?

<p>To prevent bacterial growth without harming humans (C)</p> Signup and view all the answers

What is phosphorus pentoxide?

<p>A type of oxide where the non-metal is combined with five oxygen atoms (A)</p> Signup and view all the answers

What is the systematic name of the compound H2O?

<p>Dihydrogen monoxide (A)</p> Signup and view all the answers

What is the chemical equation for the reaction between phosphorus and oxygen?

<p>4P + 5O2 → 2P2O5 (B)</p> Signup and view all the answers

What is the term for the reaction between hydrogen and oxygen?

<p>Explosive reaction (C)</p> Signup and view all the answers

What is the product of the reaction between hydrogen and oxygen?

<p>Water (C)</p> Signup and view all the answers

What is the characteristic of sulfur dioxide?

<p>It is a toxic gas (B)</p> Signup and view all the answers

What is the use of sulfur dioxide in wine production?

<p>To preserve the quality of the wine (C)</p> Signup and view all the answers

What is the term for compounds formed when non-metals react with oxygen?

<p>Non-metal oxides (C)</p> Signup and view all the answers

What determines the properties of a compound?

<p>The arrangement of atoms in the molecule (B)</p> Signup and view all the answers

What is the purpose of the Periodic Table?

<p>To classify elements as metals, non-metals, or semi-metals (D)</p> Signup and view all the answers

What is the difference between water and hydrogen peroxide?

<p>The ratio of hydrogen to oxygen atoms (C)</p> Signup and view all the answers

What is the role of chemical bonds in a compound?

<p>To attract atoms to each other (A)</p> Signup and view all the answers

What is the significance of the atomic number in the Periodic Table?

<p>It determines the position of an element on the table (C)</p> Signup and view all the answers

What is the characteristic of semi-metals?

<p>They are solids, liquids, or gases at room temperature (C)</p> Signup and view all the answers

What is the purpose of the subscript in a chemical formula?

<p>To represent the number of each type of atom in a molecule (D)</p> Signup and view all the answers

What is the difference between a metal and a non-metal?

<p>Their properties, such as shine and ductility (A)</p> Signup and view all the answers

What is the role of Dmitri Mendeleev in the development of the Periodic Table?

<p>He created the original version of the Periodic Table (D)</p> Signup and view all the answers

What is the significance of the groups in the Periodic Table?

<p>They represent the vertical columns of elements with similar properties (A)</p> Signup and view all the answers

What is the product of the reaction between iron and oxygen?

<p>Iron(III) oxide (D)</p> Signup and view all the answers

What is the term for the energy released during the combustion of magnesium?

<p>Exothermic energy (B)</p> Signup and view all the answers

What is the purpose of using fine steel threads in demonstrations of iron reacting with oxygen?

<p>To increase the surface area (A)</p> Signup and view all the answers

What is the symbolic representation of the reaction between magnesium and oxygen?

<p>2Mg + O₂ → 2MgO (A)</p> Signup and view all the answers

What is the macroscopic observation when magnesium ignites?

<p>A bright white flame (B)</p> Signup and view all the answers

What is the historical use of magnesium powder?

<p>In camera flashes (B)</p> Signup and view all the answers

What is the submicroscopic representation of the reactants in the reaction between magnesium and oxygen?

<p>Magnesium atoms and oxygen molecules (C)</p> Signup and view all the answers

What is the result of the combustion reaction between iron and oxygen?

<p>The formation of iron oxide and release of energy (D)</p> Signup and view all the answers

What is the importance of safety precautions during demonstrations of combustion reactions?

<p>To prevent intense heat and light (A)</p> Signup and view all the answers

What is the term for the process of magnesium reacting rapidly with oxygen in the air?

<p>Combustion (D)</p> Signup and view all the answers

What is the role of saltwater in the rusting process?

<p>It speeds up the rusting process because it is more conductive (A)</p> Signup and view all the answers

What happens to the structural integrity of metal objects when they rust?

<p>It is significantly degraded (C)</p> Signup and view all the answers

Why is steel commonly used in construction?

<p>Because it is strong (D)</p> Signup and view all the answers

What is the purpose of coatings in preventing rust?

<p>To prevent oxygen and moisture from reaching the metal surface (C)</p> Signup and view all the answers

What is the result of galvanizing iron or steel?

<p>It provides a protective barrier and sacrificial anode that prevents rusting (B)</p> Signup and view all the answers

Why is chromium used as a coating to prevent rust?

<p>Because it does not react with oxygen in the same way as iron (B)</p> Signup and view all the answers

What is formed when metals react with oxygen?

<p>Metal oxide (A)</p> Signup and view all the answers

What is a corrosive environment?

<p>A humid and salty environment (D)</p> Signup and view all the answers

What is the general word equation for the reaction of metals with oxygen?

<p>Metal + oxygen → Metal oxide (A)</p> Signup and view all the answers

What is the purpose of coefficients in a chemical equation?

<p>To balance the equation (B)</p> Signup and view all the answers

Why are materials like wood or aluminum preferred over iron or steel in corrosive environments?

<p>Because they do not rust (D)</p> Signup and view all the answers

What is the chemical equation for the reaction of magnesium with oxygen?

<p>2Mg + O₂ → 2MgO (C)</p> Signup and view all the answers

What is the purpose of alloying in preventing rust?

<p>To make the metal more resistant to rust (C)</p> Signup and view all the answers

What is the term for the gradual destruction of materials, usually metals, by chemical reaction with their environment?

<p>Corrosion (D)</p> Signup and view all the answers

What is the result of rust forming on iron or steel?

<p>It degrades the structural integrity and appearance of the metal (C)</p> Signup and view all the answers

What is the formula for iron oxide formed by the reaction of iron and oxygen?

<p>Fe₂O₃ (D)</p> Signup and view all the answers

What is the purpose of a picture equation?

<p>To represent the particles involved in a chemical reaction (C)</p> Signup and view all the answers

What is the general chemical equation for Group 2 metals reacting with oxygen?

<p>2M + O₂ → 2MO (C)</p> Signup and view all the answers

What is the term for a substance that can cause corrosion?

<p>Corrosive (B)</p> Signup and view all the answers

What is the chemical equation for the reaction of iron with oxygen?

<p>4Fe + 3O₂ → 2Fe₂O₃ (B)</p> Signup and view all the answers

What is the purpose of coal being burned in a power station?

<p>To generate electricity (D)</p> Signup and view all the answers

What is the reactant that reacts with carbon to produce carbon dioxide in a combustion reaction?

<p>Oxygen (A)</p> Signup and view all the answers

What is the term for a compound formed when a non-metal reacts with oxygen?

<p>Non-metal oxide (D)</p> Signup and view all the answers

What is the significance of the combustion reaction of carbon in power stations?

<p>It releases energy for generating electricity (C)</p> Signup and view all the answers

What is the product of the combustion reaction of sulfur with oxygen?

<p>Sulfur dioxide (C)</p> Signup and view all the answers

What is the importance of understanding the combustion reaction of carbon?

<p>It helps us appreciate both the benefits and environmental impact of the reaction (C)</p> Signup and view all the answers

What is the significance of the chemical equation for the reaction of carbon with oxygen?

<p>It represents the combustion reaction (B)</p> Signup and view all the answers

What is the characteristic of the flame produced when sulfur burns in oxygen?

<p>Blue (A)</p> Signup and view all the answers

What is the hazard associated with mining sulfur?

<p>Inhalation of sulfur dioxide gas (D)</p> Signup and view all the answers

What is the purpose of visual representations in understanding chemical reactions?

<p>To help students understand the reaction (D)</p> Signup and view all the answers

What is the primary reason for balancing a chemical equation?

<p>To illustrate the law of conservation of mass (A)</p> Signup and view all the answers

What is the purpose of counting atoms in a chemical equation?

<p>To ensure the law of conservation of mass is upheld (B)</p> Signup and view all the answers

What is the result of balancing a chemical equation?

<p>The number and type of atoms are the same on both sides of the equation (A)</p> Signup and view all the answers

Why is it important to balance chemical equations?

<p>To ensure the law of conservation of mass is upheld (B)</p> Signup and view all the answers

What is the term for the process of iron reacting with oxygen?

<p>Combustion (C)</p> Signup and view all the answers

What is the purpose of using steel wool in demonstrations of iron reacting with oxygen?

<p>To increase the surface area of the iron (D)</p> Signup and view all the answers

What is the main purpose of using coefficients in a chemical equation?

<p>To indicate the number of molecules or atoms involved in a reaction (D)</p> Signup and view all the answers

What is the difference between a subscript and a coefficient in a chemical formula?

<p>A subscript is used to indicate the number of atoms of an element, while a coefficient is used to indicate the number of molecules (A)</p> Signup and view all the answers

What is observed when iron or steel wool burns?

<p>Bright orange sparks (D)</p> Signup and view all the answers

What is the term for a chemical reaction that occurs when a substance combines with oxygen, releasing energy?

<p>Combustion (B)</p> Signup and view all the answers

What is the purpose of balancing a chemical equation?

<p>To ensure that the number of atoms of each element is the same on both sides of the equation (D)</p> Signup and view all the answers

What is the term for a chemical reaction where the number of atoms of each element is the same on both sides of the equation?

<p>Balanced equation (B)</p> Signup and view all the answers

What is the importance of balancing chemical equations?

<p>To ensure the law of conservation of mass is upheld (C)</p> Signup and view all the answers

What is the difference between a word equation and a picture equation?

<p>A word equation describes the reaction in words, while a picture equation uses submicroscopic diagrams (C)</p> Signup and view all the answers

What is the role of a coefficient in a chemical equation?

<p>To balance the equation (B)</p> Signup and view all the answers

What is the purpose of using subscripts in a chemical formula?

<p>To indicate the number of atoms of an element in a molecule (D)</p> Signup and view all the answers

What is the term for the process of transforming substances into different substances through the breaking and forming of bonds?

<p>Chemical reaction (D)</p> Signup and view all the answers

What is the purpose of writing a chemical equation?

<p>To represent the reactants and products of a chemical reaction (B)</p> Signup and view all the answers

What is the term for iron oxide, formed by the reaction of iron and oxygen?

<p>Rust (B)</p> Signup and view all the answers

What is the importance of balancing a chemical equation?

<p>To ensure that the number of atoms of each element is the same on both sides of the equation (D)</p> Signup and view all the answers

What is the reason behind the vigorous reaction of alkali metals with water?

<p>Low ionization energy (D)</p> Signup and view all the answers

What is the purpose of the element position rule in the IUPAC naming system?

<p>To specify the position of elements in the Periodic Table (B)</p> Signup and view all the answers

What is the suffix used in the IUPAC naming system for compounds containing only non-metals?

<p>-ide (A)</p> Signup and view all the answers

Why do compounds containing the same elements but in different ratios require distinct names?

<p>To avoid confusion (A)</p> Signup and view all the answers

What is the correct IUPAC name for the compound LiOH?

<p>Lithium hydroxide (D)</p> Signup and view all the answers

Which of the following is NOT a characteristic of alkali metals?

<p>High electronegativity (B)</p> Signup and view all the answers

What is the general formula for compounds containing a metal and a non-metal?

<p>MX (B)</p> Signup and view all the answers

What is the correct IUPAC name for the compound CO?

<p>Carbon monoxide (D)</p> Signup and view all the answers

Why is the IUPAC naming system essential in chemistry?

<p>To avoid confusion and ensure precise communication (D)</p> Signup and view all the answers

What is the reason behind the explosive reaction of potassium with water?

<p>Low ionization energy (D)</p> Signup and view all the answers

What is the main difference between the combustion reaction of iron and magnesium?

<p>The products formed in the two reactions (B)</p> Signup and view all the answers

What is the role of oxygen in the combustion reaction of magnesium?

<p>To react with magnesium to form magnesium oxide (B)</p> Signup and view all the answers

What is the significance of the submicroscopic representation of the combustion reaction of magnesium?

<p>It represents the reaction at the atomic level (A)</p> Signup and view all the answers

What is the purpose of the macroscopic representation of the combustion reaction of magnesium?

<p>To display the reactants and products of the reaction (B)</p> Signup and view all the answers

What is the importance of the symbolic representation of the combustion reaction of magnesium?

<p>It provides a concise and accurate representation of the reaction (A)</p> Signup and view all the answers

What is the role of energy in the combustion reaction of magnesium?

<p>It is released in the form of light and heat (A)</p> Signup and view all the answers

What is the significance of the historical note on the use of magnesium powder in camera flashes?

<p>It shows the application of combustion reactions in everyday life (D)</p> Signup and view all the answers

What is the main difference between the combustion reaction of iron and the combustion reaction of magnesium?

<p>The products formed in the two reactions (D)</p> Signup and view all the answers

What is the purpose of using fine steel threads in the combustion reaction of iron?

<p>To increase the surface area of the iron (A)</p> Signup and view all the answers

What is the significance of balancing the chemical equation for the combustion reaction of magnesium?

<p>It represents the correct stoichiometry of the reaction (B)</p> Signup and view all the answers

What is the main characteristic of molecules?

<p>They are clusters of atoms bonded together in a specific manner. (D)</p> Signup and view all the answers

What is the term for the smallest repeating unit that represents the compound's composition in crystal lattices?

<p>Formula unit (B)</p> Signup and view all the answers

What is the characteristic of elements that naturally exist as diatomic molecules?

<p>They consist of two atoms of the same element bonded together. (A)</p> Signup and view all the answers

What is the significance of the fixed ratio in compounds?

<p>It gives the compound its unique properties. (B)</p> Signup and view all the answers

What is the difference between water (Hâ‚‚O) and hydrogen peroxide (Hâ‚‚Oâ‚‚)?

<p>The ratio of hydrogen atoms to oxygen atoms (D)</p> Signup and view all the answers

What is the characteristic of compounds that distinguishes them from elements?

<p>They are made up of two or more different kinds of atoms. (B)</p> Signup and view all the answers

What is the term for the arrangement of atoms in a regular, repeating pattern in some compounds?

<p>Crystal lattice (A)</p> Signup and view all the answers

What is the significance of the specific manner in which atoms are bonded together in molecules?

<p>It gives the compound its unique properties. (D)</p> Signup and view all the answers

What is the main purpose of scientists representing chemical reactions on three distinct levels?

<p>To visualize and describe the changes that occur during chemical reactions (B)</p> Signup and view all the answers

What is the term for the level of representation that involves observing substances and their changes with our senses?

<p>Macroscopic level (B)</p> Signup and view all the answers

What is the term for the process in which substances are transformed into different substances through the breaking and forming of bonds?

<p>Chemical reaction (B)</p> Signup and view all the answers

What is the term for the force that holds atoms together in a molecule or compound?

<p>Chemical bond (A)</p> Signup and view all the answers

What is the purpose of using chemical symbols and formulae in the symbolic level of representation?

<p>To represent the composition and transformation of matter (D)</p> Signup and view all the answers

What is the term for a substance that is formed as a result of a chemical reaction?

<p>Product (D)</p> Signup and view all the answers

What is the level of representation that involves imagining or visualizing the particles that make up substances?

<p>Submicroscopic level (D)</p> Signup and view all the answers

What is the term for the level of representation that uses chemical symbols and formulae to represent substances and the changes they undergo during chemical reactions?

<p>Symbolic level (D)</p> Signup and view all the answers

What is the purpose of representing chemical reactions using word equations, picture equations, and chemical equations?

<p>To understand how substances interact and transform (A)</p> Signup and view all the answers

What is the term for a substance that undergoes change during a chemical reaction?

<p>Reactant (D)</p> Signup and view all the answers

What is the main reason why atoms form chemical bonds?

<p>To achieve a more stable configuration (C)</p> Signup and view all the answers

What is the primary function of the Periodic Table?

<p>To organize elements in order of increasing atomic number (B)</p> Signup and view all the answers

What is the significance of the subscript in a chemical formula?

<p>It indicates the number of atoms of the element in a molecule (C)</p> Signup and view all the answers

What is the characteristic of a chemical symbol?

<p>It is usually the first one or two letters of the element's name (B)</p> Signup and view all the answers

What is the purpose of the groups in the Periodic Table?

<p>To group elements with similar chemical properties (B)</p> Signup and view all the answers

What is the term for the process of rearranging atoms to form new molecules during a chemical reaction?

<p>Chemical reaction (C)</p> Signup and view all the answers

What is the organization principle of the Periodic Table?

<p>Elements are organized in order of increasing atomic number (B)</p> Signup and view all the answers

What is the role of Dmitri Mendeleev in the development of the Periodic Table?

<p>He proposed the original version of the Periodic Table (C)</p> Signup and view all the answers

What is the characteristic of semi-metals?

<p>They have properties of both metals and non-metals (D)</p> Signup and view all the answers

What is the term for the attractive forces that bind atoms together in a molecule?

<p>Chemical bonds (D)</p> Signup and view all the answers

What is the main difference between the reaction of iron with oxygen and the reaction of magnesium with oxygen?

<p>The number of atoms of oxygen required is different. (A)</p> Signup and view all the answers

What is the role of coefficients in a chemical equation?

<p>To indicate the ratio of reactants to products. (C)</p> Signup and view all the answers

What is the general chemical equation for Group 1 metals reacting with oxygen?

<p>4M + O₂ → 2M₂O (B)</p> Signup and view all the answers

What is the primary component of rust?

<p>Iron oxide (Fe₂O₃) (B)</p> Signup and view all the answers

What is the purpose of balancing a chemical equation?

<p>To ensure the number of atoms of each element is equal on both sides of the equation. (D)</p> Signup and view all the answers

What is the difference between a word equation and a chemical equation?

<p>A word equation uses words whereas a chemical equation uses symbols and formulas. (C)</p> Signup and view all the answers

What is the general chemical equation for Group 2 metals reacting with oxygen?

<p>2M + O₂ → 2MO (B)</p> Signup and view all the answers

What is the role of subscripts in a chemical formula?

<p>To indicate the number of atoms of an element in a molecule or formula unit. (B)</p> Signup and view all the answers

What is corrosion?

<p>The gradual destruction of materials, usually metals, by chemical reaction with their environment. (D)</p> Signup and view all the answers

What is the term for the reddish-brown flaky substance that forms on iron when it reacts with oxygen in the air?

<p>Rust (D)</p> Signup and view all the answers

What is the primary reason why iron rusts faster in moist environments?

<p>The moisture provides a pathway for oxygen to react with the iron. (A)</p> Signup and view all the answers

What is the purpose of applying a zinc coating to iron or steel?

<p>To provide a sacrificial anode that prevents rusting. (D)</p> Signup and view all the answers

What is the effect of acidic environments on the rusting process?

<p>Acidic environments increase the rate of rusting by facilitating electrochemical reactions. (A)</p> Signup and view all the answers

Why are materials like wood or aluminum preferred over iron or steel in corrosive environments?

<p>They do not rust or corrode in the same way as iron or steel. (C)</p> Signup and view all the answers

What is the primary advantage of using stainless steel in construction?

<p>It is resistant to rust and corrosion due to the presence of chromium. (D)</p> Signup and view all the answers

What is the role of oxygen in the rusting process?

<p>Oxygen reacts with iron to form iron oxide, or rust. (C)</p> Signup and view all the answers

What is the purpose of applying a coating of paint to iron or steel?

<p>To create a protective barrier that prevents oxygen and moisture from reaching the metal. (C)</p> Signup and view all the answers

What is the term for the process of coating a metal with a layer of chromium to prevent rusting?

<p>Chroming (C)</p> Signup and view all the answers

What is the significance of rust in terms of structural integrity and appearance?

<p>Rust can sometimes be aesthetically pleasing in art, but it is usually detrimental to the functionality and longevity of metal structures. (C)</p> Signup and view all the answers

What is the primary reason why steel is commonly used in construction?

<p>It is stronger and more durable than other metals. (D)</p> Signup and view all the answers

Why is zinc used to galvanize iron?

<p>Because zinc reacts with oxygen to form a dense protective layer (B)</p> Signup and view all the answers

What is the general word equation for the reaction of non-metals with oxygen?

<p>Non-metal + oxygen → non-metal oxide (C)</p> Signup and view all the answers

What is the chemical equation for the reaction of carbon with oxygen?

<p>C + O2 → CO2 (A)</p> Signup and view all the answers

What is the purpose of galvanizing iron?

<p>To prevent rusting of iron (A)</p> Signup and view all the answers

What is the reaction between a non-metal and oxygen called?

<p>Combustion (B)</p> Signup and view all the answers

What is the product of the reaction between sulfur and oxygen?

<p>Sulfur dioxide (D)</p> Signup and view all the answers

What is the purpose of coating metal with chromium?

<p>To prevent rusting of metal (B)</p> Signup and view all the answers

What is the chemical equation for the reaction of phosphorus with oxygen?

<p>4P + 5O2 → 2P2O5 (C)</p> Signup and view all the answers

Why does rusting occur faster in moist or corrosive environments?

<p>Because the environment is more reactive (A)</p> Signup and view all the answers

What is the purpose of galvanised products?

<p>To make products more durable and rust-resistant (C)</p> Signup and view all the answers

What is the primary purpose of using sulfur dioxide in food preservation?

<p>To prevent bacterial growth and extend shelf life (A)</p> Signup and view all the answers

What is the systematic name of the compound formed by the reaction of phosphorus and oxygen?

<p>Phosphorus pentoxide (B)</p> Signup and view all the answers

What is the term for the force that holds atoms together in a molecule or compound?

<p>Chemical bond (B)</p> Signup and view all the answers

What is the chemical equation for the reaction of sulfur and oxygen?

<p>S + O2 → SO2 (B)</p> Signup and view all the answers

What is the purpose of using sulfur dioxide in wine production?

<p>To preserve the quality of the wine (C)</p> Signup and view all the answers

What is the type of oxide formed by the reaction of phosphorus and oxygen?

<p>Pentoxide (C)</p> Signup and view all the answers

What is the potential health risk associated with exposure to sulfur dioxide?

<p>Respiratory problems (A)</p> Signup and view all the answers

What is the chemical equation for the reaction of hydrogen and oxygen?

<p>2H2 + O2 → 2H2O (A)</p> Signup and view all the answers

What is the term for the compounds formed when non-metals react with oxygen?

<p>Non-metal oxides (B)</p> Signup and view all the answers

What is the characteristic of sulfur dioxide that makes it useful as a preservative?

<p>Antimicrobial properties (B)</p> Signup and view all the answers

What is the type of reaction that occurs when coal burns in air?

<p>Combustion reaction (C)</p> Signup and view all the answers

What is the product of the reaction between carbon and oxygen?

<p>Carbon dioxide (B)</p> Signup and view all the answers

What is the significance of the combustion reaction of carbon in power stations?

<p>It releases a significant amount of energy (D)</p> Signup and view all the answers

What is the general equation for the reaction of a non-metal with oxygen?

<p>Non-metal + oxygen → non-metal oxide (D)</p> Signup and view all the answers

What is the characteristic of sulfur dioxide gas?

<p>It is a toxic gas (B)</p> Signup and view all the answers

What is the purpose of visual representations in chemistry?

<p>To visualize the submicroscopic level of a reaction (D)</p> Signup and view all the answers

What is the environmental implication of the combustion reaction of carbon in power stations?

<p>It releases a greenhouse gas, contributing to global climate change (A)</p> Signup and view all the answers

What is the definition of combustion?

<p>A chemical reaction that releases heat and light (D)</p> Signup and view all the answers

What is the difference between the combustion reactions of carbon and sulfur?

<p>Carbon produces a non-toxic gas, while sulfur produces a toxic gas (D)</p> Signup and view all the answers

What is the importance of understanding the combustion reaction of carbon?

<p>It helps us appreciate both the benefits and environmental implications of using coal as a fuel source (C)</p> Signup and view all the answers

What type of compounds are formed when non-metals react with oxygen?

<p>Non-metal oxides (D)</p> Signup and view all the answers

What is the purpose of word equations, picture equations, and chemical equations?

<p>To represent chemical reactions (A)</p> Signup and view all the answers

What is the importance of following IUPAC rules in naming compounds?

<p>To ensure clarity and uniqueness (A)</p> Signup and view all the answers

What is the significance of balancing chemical equations?

<p>To ensure the conservation of mass (B)</p> Signup and view all the answers

What is the pH value a measurement of?

<p>The acidity or basicity of a solution (D)</p> Signup and view all the answers

What is the role of indicators in chemistry?

<p>To show whether a solution is acidic or basic (A)</p> Signup and view all the answers

What is the general equation for the reaction between an acid and a base?

<p>acid + base → salt + water (A)</p> Signup and view all the answers

What is the pH of a solution formed by dissolving a metal oxide in water?

<p>pH &gt; 7 (A)</p> Signup and view all the answers

What is the product formed when an acid reacts with a non-metal oxide?

<p>acid and carbon dioxide (B)</p> Signup and view all the answers

What is the common characteristic of laboratory acids?

<p>They are highly corrosive (D)</p> Signup and view all the answers

What is the impact of acid rain on the environment?

<p>It damages plant life and acidifies water sources (D)</p> Signup and view all the answers

What is the general equation for the reaction between an acid and a metal oxide?

<p>acid + metal oxide → salt + water (C)</p> Signup and view all the answers

What is the purpose of the universal indicator paper in the experiment with magnesium oxide and hydrochloric acid?

<p>To measure the pH of the solution (D)</p> Signup and view all the answers

What is the type of solution formed when a metal hydroxide is dissolved in water?

<p>Basic (A)</p> Signup and view all the answers

What is the correct sequence of steps to write a reaction equation?

<p>Identify the reactants, combine the reactants, balance the equation (D)</p> Signup and view all the answers

What is the term for the reaction between an acid and a metal oxide?

<p>Exchange reaction (D)</p> Signup and view all the answers

What is the characteristic of acids based on the taste?

<p>Sour (B)</p> Signup and view all the answers

What is the pH range of strong acids?

<p>pH 1-3 (D)</p> Signup and view all the answers

What is the purpose of indicators?

<p>To measure the pH of a solution (D)</p> Signup and view all the answers

What is the product of the neutralization reaction between an acid and a base?

<p>Water and a salt (B)</p> Signup and view all the answers

What is the term for the scale that measures the acidity or basicity of a substance?

<p>pH scale (A)</p> Signup and view all the answers

What is the characteristic of bases based on their feel?

<p>Slippery (B)</p> Signup and view all the answers

What is the pH of a neutral substance?

<p>pH 7 (B)</p> Signup and view all the answers

What is the purpose of the universal indicator?

<p>To measure the pH of a solution (D)</p> Signup and view all the answers

What is the result of mixing an acid and a base?

<p>The formation of a salt and water (B)</p> Signup and view all the answers

What is the term for the reaction between an acid and a base?

<p>Neutralization reaction (D)</p> Signup and view all the answers

What is calcium carbonate commonly found in?

<p>Dark green leafy vegetables, snails, and pearls (B)</p> Signup and view all the answers

What is the purpose of adding agricultural lime to soil?

<p>To neutralize acidic soil and provide calcium for plant growth (A)</p> Signup and view all the answers

What is the gas produced when hydrochloric acid reacts with magnesium?

<p>Hydrogen gas (A)</p> Signup and view all the answers

What is the role of a chemist?

<p>To conduct research, develop new products, analyze substances, and study chemical reactions (C)</p> Signup and view all the answers

What is the general equation for the reaction between an acid and a metal?

<p>Acid + metal → salt + hydrogen gas (B)</p> Signup and view all the answers

What is the product of the reaction between hydrochloric acid and magnesium?

<p>Magnesium chloride (D)</p> Signup and view all the answers

What is the term for the process of adding lime to soil to increase its pH?

<p>Liming (B)</p> Signup and view all the answers

What is calcium carbonate used in?

<p>Construction materials, adhesives, and paints (A)</p> Signup and view all the answers

What is the purpose of using calcium carbonate supplements?

<p>To provide a dietary source of calcium (D)</p> Signup and view all the answers

What is an example of a geological formation that contains calcium carbonate?

<p>The Cango Caves (C)</p> Signup and view all the answers

What is the general equation for the reaction of an acid with a metal hydroxide?

<p>acid + metal hydroxide → salt + water (D)</p> Signup and view all the answers

What is the product of the reaction between hydrochloric acid and sodium hydroxide?

<p>sodium chloride (A)</p> Signup and view all the answers

What is the purpose of the universal indicator paper in the experiment between sodium hydroxide and hydrochloric acid?

<p>to measure the pH of the resulting solution (C)</p> Signup and view all the answers

What is the general equation for the reaction of an acid with a metal carbonate?

<p>acid + metal carbonate → salt + water + carbon dioxide (C)</p> Signup and view all the answers

What is the product of the reaction between calcium carbonate and hydrochloric acid?

<p>calcium chloride (C)</p> Signup and view all the answers

What is the characteristic of metal carbonates?

<p>they react with acids to form a salt, water, and carbon dioxide (D)</p> Signup and view all the answers

What is the purpose of the steps to write reaction equations?

<p>to predict the products of the reaction (B)</p> Signup and view all the answers

What is the observation when calcium carbonate reacts with hydrochloric acid?

<p>bubbles form, indicating the production of a gas (D)</p> Signup and view all the answers

What is the role of the reactants in the reaction between an acid and a metal hydroxide?

<p>the acid is the acid and the metal hydroxide is the base (D)</p> Signup and view all the answers

What is the characteristic of the reaction between an acid and a metal hydroxide?

<p>it forms a salt and water (A)</p> Signup and view all the answers

What is the primary focus of a pharmacist?

<p>The application of medications in healthcare (C)</p> Signup and view all the answers

What is the typical work environment for a pharmacist?

<p>Pharmacies, hospitals, clinics, and healthcare facilities (D)</p> Signup and view all the answers

What is a key difference between a pharmacist and a chemist?

<p>Pharmacists focus on the application of medications, while chemists focus on research and development (B)</p> Signup and view all the answers

What is a primary role of a pharmacist?

<p>Dispensing medications to patients (B)</p> Signup and view all the answers

What is a key difference in education between pharmacists and chemists?

<p>Pharmacists have degrees in pharmacy, while chemists have degrees in chemistry (D)</p> Signup and view all the answers

What is the general reaction between an acid and a metal oxide?

<p>acid + metal oxide → salt + water (D)</p> Signup and view all the answers

What is the product of the reaction between hydrochloric acid and magnesium oxide?

<p>magnesium chloride and water (B)</p> Signup and view all the answers

What is the characteristic of metal oxides in water?

<p>they are basic and form solutions with pH values above 7 (A)</p> Signup and view all the answers

What is the pH range of solutions formed by non-metal oxides in water?

<p>pH &lt; 7 (A)</p> Signup and view all the answers

What is the correct sequence of steps to write a reaction equation?

<p>identify the reactants, combine the reactants to predict the products, balance the equation (C)</p> Signup and view all the answers

What is the product of the reaction between carbon dioxide and water?

<p>carbonic acid (D)</p> Signup and view all the answers

What is the impact of acid rain on the environment?

<p>it damages plant life, acidifies water sources, and corrodes buildings and monuments (D)</p> Signup and view all the answers

What is the general equation for the reaction between an acid and a base?

<p>acid + base → salt + water (A)</p> Signup and view all the answers

What is the characteristic of metal hydroxides in water?

<p>they are basic and form solutions with pH values above 7 (D)</p> Signup and view all the answers

What is the correct term for the reaction between an acid and a metal oxide?

<p>acid-base reaction (B)</p> Signup and view all the answers

What is the general equation for the reaction of an acid with a metal hydroxide?

<p>acid + metal hydroxide → salt + water (A)</p> Signup and view all the answers

What is the product formed when hydrochloric acid reacts with sodium hydroxide?

<p>sodium chloride and water (B)</p> Signup and view all the answers

What is the purpose of the universal indicator paper in the experiment of sodium hydroxide with hydrochloric acid?

<p>to observe the pH changes during the reaction (B)</p> Signup and view all the answers

What is the general equation for the reaction of an acid with a metal carbonate?

<p>acid + metal carbonate → salt + water + carbon dioxide (D)</p> Signup and view all the answers

What is the reactant that reacts with hydrochloric acid to form calcium chloride, water, and carbon dioxide?

<p>calcium carbonate (D)</p> Signup and view all the answers

What is the product formed when sulfuric acid reacts with potassium hydroxide?

<p>potassium sulfate and water (C)</p> Signup and view all the answers

What is the purpose of balancing a chemical equation?

<p>to ensure the number of atoms of each element is the same on both sides (A)</p> Signup and view all the answers

What is the reactant that reacts with calcium carbonate to form calcium chloride, water, and carbon dioxide?

<p>hydrochloric acid (A)</p> Signup and view all the answers

What is the general equation for the reaction of an acid with a base?

<p>acid + base → salt + water (D)</p> Signup and view all the answers

What is the product formed when hydrochloric acid reacts with potassium carbonate?

<p>potassium chloride, water, and carbon dioxide (B)</p> Signup and view all the answers

What is the primary focus of a pharmacist's work?

<p>Applying medications in healthcare (C)</p> Signup and view all the answers

What is the main component of shells of marine organisms, snails, pearls, oysters, and bird eggshells?

<p>Calcium carbonate (B)</p> Signup and view all the answers

What is the characteristic of acids that distinguishes them from bases?

<p>Taste sour (A)</p> Signup and view all the answers

What is the purpose of adding lime to soil in agriculture?

<p>To increase the pH of the soil (C)</p> Signup and view all the answers

What is the main difference between a chemist and a pharmacist?

<p>Focus of their work (B)</p> Signup and view all the answers

What is the pH range of strong acids?

<p>pH 1-3 (A)</p> Signup and view all the answers

What is the gas produced when hydrochloric acid reacts with magnesium?

<p>Hydrogen gas (B)</p> Signup and view all the answers

In which type of setting do pharmacists typically work?

<p>Hospitals and healthcare facilities (A)</p> Signup and view all the answers

What is the purpose of universal indicator paper?

<p>To measure the pH of a solution (B)</p> Signup and view all the answers

What is the role of a chemist?

<p>To study the properties and reactions of substances (B)</p> Signup and view all the answers

What is a key responsibility of a pharmacist?

<p>Dispensing medications and providing patient counseling (C)</p> Signup and view all the answers

What happens when an acid and a base are mixed?

<p>They neutralize each other (C)</p> Signup and view all the answers

What is a pharmacist's role in ensuring the safe use of medications?

<p>Providing patient counseling and managing medication therapy (B)</p> Signup and view all the answers

What is the general equation for the reaction between an acid and a metal?

<p>Acid + metal → salt + hydrogen gas (B)</p> Signup and view all the answers

What is the pH of neutral substances?

<p>pH 7 (B)</p> Signup and view all the answers

What is the product of the reaction between magnesium and hydrochloric acid?

<p>Magnesium chloride and hydrogen gas (D)</p> Signup and view all the answers

What is the term for the process of adding lime to soil to increase its pH and provide calcium for plant growth?

<p>Liming (B)</p> Signup and view all the answers

What is the term for the reaction between an acid and a base?

<p>Neutralization reaction (C)</p> Signup and view all the answers

What is calcium carbonate commonly used in?

<p>All of the above (D)</p> Signup and view all the answers

What is the purpose of the pH scale?

<p>To measure the acidity or basicity of a solution (C)</p> Signup and view all the answers

What is the purpose of conducting the investigation between hydrochloric acid and magnesium?

<p>To investigate the reaction between an acid and a metal (D)</p> Signup and view all the answers

What is the result of a neutralization reaction?

<p>Formation of water and a salt (A)</p> Signup and view all the answers

What is the chemical equation for the reaction between hydrochloric acid and magnesium?

<p>2HCl + Mg → MgCl₂ + H₂ (C)</p> Signup and view all the answers

What is the characteristic of strong bases?

<p>pH range of 11-14 (D)</p> Signup and view all the answers

What is the purpose of indicators in measuring pH?

<p>To show the pH of a solution by changing colors (B)</p> Signup and view all the answers

What is the purpose of word equations, picture equations, and chemical equations?

<p>To represent and understand reactions (B)</p> Signup and view all the answers

What is the significance of the IUPAC naming system?

<p>To ensure each compound has a unique name (C)</p> Signup and view all the answers

What is a key concept in understanding acids and bases?

<p>pH value (A)</p> Signup and view all the answers

Why is it important to balance chemical equations?

<p>To ensure the conservation of mass (C)</p> Signup and view all the answers

What is formed when non-metals react with oxygen?

<p>Non-metal oxides (D)</p> Signup and view all the answers

What is the role of indicators in chemistry?

<p>To show whether a solution is acidic or basic (D)</p> Signup and view all the answers

What is the general word equation for the reaction between an acid and a metal hydroxide?

<p>acid + metal hydroxide → salt + water (A)</p> Signup and view all the answers

What is the reactant that is a base in the reaction between hydrochloric acid and sodium hydroxide?

<p>sodium hydroxide (A)</p> Signup and view all the answers

What is the gas produced in the reaction between an acid and a metal carbonate?

<p>carbon dioxide (C)</p> Signup and view all the answers

What is the purpose of the universal indicator paper in the experiment of the reaction between sodium hydroxide and hydrochloric acid?

<p>to measure the pH of the resulting solution (C)</p> Signup and view all the answers

What is the specific salt that forms in the reaction between hydrochloric acid and sodium hydroxide?

<p>sodium chloride (B)</p> Signup and view all the answers

What is the reactant that is an acid in the reaction between hydrochloric acid and sodium hydroxide?

<p>hydrochloric acid (C)</p> Signup and view all the answers

What is the product that is a salt in the reaction between sulfuric acid and potassium hydroxide?

<p>potassium sulfate (D)</p> Signup and view all the answers

What is the metal cation in the metal carbonate CaCO₃?

<p>calcium (B)</p> Signup and view all the answers

What is the primary function of an indicator in measuring pH?

<p>To show whether a substance is acidic or basic (D)</p> Signup and view all the answers

What is the purpose of balancing a chemical equation?

<p>to ensure that the number of atoms of each element is the same on both sides of the equation (B)</p> Signup and view all the answers

What is the type of reaction that occurs between an acid and a metal hydroxide?

<p>neutralization reaction (D)</p> Signup and view all the answers

Which of the following is a characteristic of a strong acid?

<p>pH 1-3 (B)</p> Signup and view all the answers

What is the result of mixing an acid and a base?

<p>A solution with a pH that depends on the strength of the acid and base (B)</p> Signup and view all the answers

What is the term for the reaction between an acid and a base?

<p>Neutralisation (D)</p> Signup and view all the answers

What is the pH range of weak acids?

<p>pH 4-6 (D)</p> Signup and view all the answers

What is the purpose of the pH scale?

<p>To measure the acidity or basicity of a substance (D)</p> Signup and view all the answers

What is the term for the substance that is formed when an acid and a base react?

<p>Salt (B)</p> Signup and view all the answers

What is the pH of a neutral substance?

<p>pH 7 (B)</p> Signup and view all the answers

What is the function of universal indicator paper?

<p>To determine the pH of a solution (D)</p> Signup and view all the answers

What is the term for the force that holds atoms together in a molecule or compound?

<p>Chemical bond (D)</p> Signup and view all the answers

What is the key difference between metal oxides and non-metal oxides?

<p>Metal oxides are basic, while non-metal oxides are acidic. (C)</p> Signup and view all the answers

What is the general equation for the reaction of an acid with a metal oxide?

<p>acid + metal oxide → salt + water (D)</p> Signup and view all the answers

What is the pH of the solution formed when a metal oxide is dissolved in water?

<p>pH &gt; 7 (C)</p> Signup and view all the answers

What is the result of the reaction between magnesium oxide and hydrochloric acid?

<p>Magnesium chloride is formed, and water is produced. (C)</p> Signup and view all the answers

What is the purpose of the universal indicator paper in the experiment involving magnesium oxide and hydrochloric acid?

<p>To measure the pH of the solution (B)</p> Signup and view all the answers

What is the general word equation for the reaction of an acid with a metal oxide?

<p>acid + metal oxide → salt + water (B)</p> Signup and view all the answers

What is the chemical equation for the reaction of copper(II) oxide with hydrochloric acid?

<p>2HCl + CuO → CuCl₂ + H₂O (B)</p> Signup and view all the answers

What is the step in writing a reaction equation that involves combining the reactants to predict the products?

<p>Combining the reactants to predict the products (B)</p> Signup and view all the answers

What is the characteristic of acid rain?

<p>It damages plant life, acidifies water sources, and corrodes buildings and monuments (A)</p> Signup and view all the answers

What is the difference between a metal oxide and a metal hydroxide?

<p>A metal oxide is formed from a metal and oxygen, while a metal hydroxide is formed from a metal and water (C)</p> Signup and view all the answers

What is the primary focus of a pharmacist in healthcare?

<p>Application of pharmaceutical drugs in patient care (D)</p> Signup and view all the answers

What is the primary component of shells of marine organisms, such as snails, pearls, and oysters?

<p>Calcium carbonate (B)</p> Signup and view all the answers

What is the key difference in the education of a pharmacist and a chemist?

<p>Pharmacists have degrees in pharmacy and are licensed healthcare professionals (B)</p> Signup and view all the answers

What is the purpose of adding lime to soil in agricultural practices?

<p>To increase the pH of the soil and provide a source of calcium (A)</p> Signup and view all the answers

In what type of settings do pharmacists typically work?

<p>Pharmacies, hospitals, clinics, and healthcare facilities (A)</p> Signup and view all the answers

What is a key responsibility of pharmacists in ensuring patient safety?

<p>Dispensing medications and providing patient counseling (C)</p> Signup and view all the answers

What is the gas produced when hydrochloric acid reacts with magnesium?

<p>Hydrogen gas (B)</p> Signup and view all the answers

What is the role of a chemist in various industries?

<p>To analyze substances and develop new products (D)</p> Signup and view all the answers

What is the main difference in the focus of pharmacists and chemists?

<p>Pharmacists focus on the application of medications, while chemists focus on the science of chemicals (C)</p> Signup and view all the answers

What is the general equation for the reaction between an acid and a metal?

<p>Acid + metal → salt + hydrogen gas (D)</p> Signup and view all the answers

What is the purpose of the gas collection apparatus in the investigation of the reaction between hydrochloric acid and magnesium?

<p>To collect and analyze the gas produced (D)</p> Signup and view all the answers

What is the chemical equation for the reaction between hydrochloric acid and magnesium?

<p>2HCl + Mg → MgCl₂ + H₂ (C)</p> Signup and view all the answers

What is the role of the thistle funnel in the investigation of the reaction between hydrochloric acid and magnesium?

<p>To add the hydrochloric acid to the magnesium ribbon (C)</p> Signup and view all the answers

What is the characteristic of the gas produced in the reaction between hydrochloric acid and magnesium?

<p>It is highly flammable and produces a 'pop' sound when exposed to a flame (B)</p> Signup and view all the answers

What is the purpose of the lit match or lighter in the investigation of the reaction between hydrochloric acid and magnesium?

<p>To test the gas produced for flammability (A)</p> Signup and view all the answers

Which of the following is not a characteristic of non-metal oxides?

<p>They are formed when metals react with oxygen (C)</p> Signup and view all the answers

What is the primary purpose of word equations, picture equations, and chemical equations?

<p>To represent chemical reactions and understand the underlying principles (D)</p> Signup and view all the answers

What is the significance of the IUPAC naming system in chemistry?

<p>It provides a unique and universal way of naming compounds (C)</p> Signup and view all the answers

What is the primary purpose of indicators in chemistry?

<p>To show whether a solution is acidic or basic (A)</p> Signup and view all the answers

What is the primary importance of understanding the reactions of non-metals with oxygen?

<p>It provides insights into the properties of different elements and compounds (C)</p> Signup and view all the answers

What is the primary significance of pH value in chemistry?

<p>It measures the acidity or basicity of a solution (C)</p> Signup and view all the answers

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