Metals and Their Properties Quiz
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Questions and Answers

Which metal is known as the best electrical conductor?

  • Aluminum
  • Copper
  • Iron
  • Silver (correct)

    • Graphite is a poor conductor of electricity.

    False

    What is the primary reason why metals are used in cooking utensils?

    They readily conduct heat energy.

    ______ is an example of a metal that is commonly used in electrical fittings.

    <p>Copper</p> Signup and view all the answers

    What are the two broad categories of elements?

    <p>Metals and Non-Metals</p> Signup and view all the answers

    Match the following materials with their described properties:

    <p>Iron = Good thermal conductor Copper = Best electrical conductor Graphite = Good electrical conductor Mercury = Poorest conductor among listed metals</p> Signup and view all the answers

    Which of the following is a property that is generally true for metals?

    <p>High density</p> Signup and view all the answers

    Iodine is a non-metal that has a shiny appearance.

    <p>True</p> Signup and view all the answers

    Pure substances can consist of different kinds of atoms or molecules.

    <p>False</p> Signup and view all the answers

    What is the hardest substance known?

    <p>Diamond</p> Signup and view all the answers

    Define what is meant by 'classification of elements'.

    <p>Grouping of elements with similar properties to study their general characteristics.</p> Signup and view all the answers

    Which metal is the most abundant in the Earth's crust?

    <p>Aluminium</p> Signup and view all the answers

    Most metals are ______ and can withstand high pressure without deforming.

    <p>hard</p> Signup and view all the answers

    Materials made of the same kind of particles are known as __________.

    <p>pure substances</p> Signup and view all the answers

    All metals occur in their found state in nature.

    <p>False</p> Signup and view all the answers

    Match the following terms with their definitions:

    <p>Element = A substance that cannot be broken down into simpler substances Compound = A substance formed from two or more elements chemically bonded Metal = A good conductor of heat and electricity Non-Metal = Generally poor conductors of heat and electricity</p> Signup and view all the answers

    What is the term for a mineral from which one or more metals can be extracted profitably?

    <p>Ore</p> Signup and view all the answers

    Match the following elements with their state at room temperature:

    <p>Carbon = Solid Bromine = Liquid Chlorine = Gas Iodine = Solid</p> Signup and view all the answers

    Mercury is the only metal that is ______ at room temperature.

    <p>liquid</p> Signup and view all the answers

    Match the metal with its corresponding property:

    <p>Iron = Solid at room temperature Copper = Conductive Aluminium = Lightweight Gold = Lustrous appearance</p> Signup and view all the answers

    What is malleability?

    <p>The ability of a metal to be hammered into thin sheets without breaking.</p> Signup and view all the answers

    Non-metals are generally ductile.

    <p>False</p> Signup and view all the answers

    What is formed when magnesium ribbon burns in oxygen?

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

    Name one metal that is commonly used for electrical wires.

    <p>Copper</p> Signup and view all the answers

    The solution formed by dissolving magnesium oxide in water is acidic.

    <p>False</p> Signup and view all the answers

    Metals have high ________ strength due to their ductility and malleability.

    <p>tensile</p> Signup and view all the answers

    What color does red litmus paper turn when dipped in an alkaline solution?

    <p>blue</p> Signup and view all the answers

    Match the following properties of metals with their definitions:

    <p>Malleability = Ability to be hammered into thin sheets Ductility = Ability to be drawn into thin wires Tensile Strength = Ability to withstand strain without breaking Conductivity = Ability to transfer heat or electrical currents</p> Signup and view all the answers

    High reactivity to oxygen is characteristic of metals such as potassium, sodium, and __________.

    <p>calcium</p> Signup and view all the answers

    Match the following activities with their outcomes:

    <p>Activity 5 = Formation of magnesium oxide Activity 6 = Demonstration of basic metallic oxides Magnesium ribbon = Burns with bright white light Charcoal = Reacts with oxygen in a gas jar</p> Signup and view all the answers

    Which physical property is characteristic of metals?

    <p>They are generally ductile.</p> Signup and view all the answers

    Non-metals typically have high melting and boiling points.

    <p>False</p> Signup and view all the answers

    What does magnesium oxide dissolve in water to form?

    <p>Magnesium hydroxide</p> Signup and view all the answers

    All metals are in solid state, except for __________.

    <p>mercury</p> Signup and view all the answers

    Match the following properties to their corresponding categories:

    <p>High density = Metals Good insulators = Non-metals Sonorous = Metals Brittle = Non-metals</p> Signup and view all the answers

    Which of the following is NOT a typical property of metals?

    <p>Dull appearance</p> Signup and view all the answers

    All non-metals are brittle.

    <p>False</p> Signup and view all the answers

    Potassium reacts with water to form __________.

    <p>potassium hydroxide</p> Signup and view all the answers

    Which gas is produced when magnesium reacts with water?

    <p>Hydrogen</p> Signup and view all the answers

    Iron reacts readily with water.

    <p>False</p> Signup and view all the answers

    What is the indicator used to test the acidity of carbon dioxide in water?

    <p>blue litmus paper</p> Signup and view all the answers

    When charcoal burns in the presence of oxygen, it produces __________.

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

    Match the metal with its observed reaction:

    <p>Magnesium = Reacts with water to form hydrogen gas Iron = Reacts with acids but not with water Zinc = Reacts similarly to iron with acid Mercury = Does not react readily with water or acids</p> Signup and view all the answers

    What is the product of burning charcoal with oxygen?

    <p>Carbon Dioxide</p> Signup and view all the answers

    Zinc reacts with water as vigorously as magnesium.

    <p>False</p> Signup and view all the answers

    What protective layer prevents further oxidation in aluminum cookware?

    <p>aluminum oxide</p> Signup and view all the answers

    What gas is evolved when magnesium reacts with water?

    <p>Hydrogen</p> Signup and view all the answers

    Copper reacts with water to produce hydrogen gas.

    <p>False</p> Signup and view all the answers

    What indication shows that hydrogen gas is evolved during the acid reaction?

    <p>A popping sound when a burning splinter is brought near.</p> Signup and view all the answers

    Some metals, like _______ and ______, react vigorously with water.

    <p>sodium, potassium</p> Signup and view all the answers

    Match the metals with their reactivity with acids:

    <p>Iron = React with steam Magnesium = React with boiling water Zinc = React moderately with acids Copper = Do not react with acids</p> Signup and view all the answers

    What should be done to prevent reactive metals from reaction with air?

    <p>Store them under kerosene or paraffin wax</p> Signup and view all the answers

    All non-metals react with water.

    <p>False</p> Signup and view all the answers

    What are the two chemical forms produced when magnesium reacts with water?

    <p>Magnesium hydroxide and hydrogen gas.</p> Signup and view all the answers

    What gas is released when metals react with dilute acids?

    <p>Hydrogen</p> Signup and view all the answers

    Copper reacts with dilute hydrochloric acid to liberate hydrogen gas.

    <p>False</p> Signup and view all the answers

    What is produced when aluminum reacts with sodium hydroxide and water?

    <p>Sodium tetrahydroxoaluminate and hydrogen gas</p> Signup and view all the answers

    Certain food items should not be stored in ______ utensils due to acid reactions.

    <p>metal</p> Signup and view all the answers

    Which of the following does NOT typically react with dilute acids?

    <p>Gold</p> Signup and view all the answers

    Match the following metals to their behavior with acids:

    <p>Iron = Reacts with dilute acids Copper = Does not react with dilute hydrochloric acid Aluminum = Reacts with sodium hydroxide and water Gold = Does not react with dilute acids</p> Signup and view all the answers

    Most metals do not react with alkalis to release hydrogen gas.

    <p>True</p> Signup and view all the answers

    Potassium is the most ______ metal.

    <p>reactive</p> Signup and view all the answers

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