CLASS 7 CHEMISTRY METALS AND NON METALS

What is the process of extracting metals in pure form from their ores called?

Which of the following metals is most likely to be found in a free or native state?

What are naturally occurring minerals from which metals can be extracted profitably and easily called?

What is the ability of a metal to be beaten into thin sheets called?

Which property allows a metal to be drawn into wires?

What is the measure of a metal's ability to withstand stress without breaking known as?

Which metal is commonly used in electrical cables due to its high conductivity?

Which non-metal is a key component of lead pencils?

Which of the following metals reacts vigorously with dilute acids?

What gas is typically evolved when metals react with dilute acids?

Which term describes metals that get oxidized easily?

What is the name given to elements found on the left side of the periodic table?

Which of the following is the most reactive halogen?

Which noble gas is used in light bulbs to prevent filament oxidation?

What are the two essential conditions needed for iron to rust?

What type of substance is rust, chemically speaking?

Which substance is formed when copper corrodes?

What term defines the ability of a metal to produce a resonant sound when struck?

What are elements that possess properties of both metals and non-metals called?

What is the purpose of quicklime in preventing rust?

Why are noble gases like Argon used in light bulbs?

You have two unknown metals. Metal X reacts rapidly with dilute hydrochloric acid, while Metal Y shows no reaction. What can you infer?

Which statement accurately describes the relationship between minerals and ores?

Why do metalloids exhibit intermediate electrical conductivity compared to metals and non-metals?

A metal is described as 'sonorous'. What does this tell you about the metal?

Why is the presence of both oxygen and moisture crucial for iron to rust?

Given the reaction: $4Fe + 3O_2 → 2Fe_2O_3$, what does this equation primarily represent in the context of corrosion?

How does the application of a metallic coating, such as zinc (galvanization), prevent the rusting of iron?

Which statement best describes the role of quicklime in preventing rust?

What is a key difference between the corrosion of iron and the corrosion of copper?

How does the purity of iron contribute to its resistance to corrosion, as seen in the Iron Pillar of Delhi?

You find a metal that is lustrous, conducts electricity, and is easily shaped into wires. Which classification best fits this metal?

If a metal sample can be hammered into a thin sheet without breaking, which property is being demonstrated?

Which halogen is most effective at preventing tooth decay when added to dental products?

Why are metals like gold and platinum often found in a 'native' state?

A material is described as being a semiconductor. Which class of elements does it likely belong to?

What is the primary reason Sulphur is used in the vulcanization of rubber?

Which property of aluminum makes it suitable for use in packaging materials?

In which application is magnesium commonly used due to its specific properties?

Given the varying reactivity of metals with acids, how would you comparatively assess the standard reduction potentials of Magnesium (Mg), Iron (Fe), and Copper (Cu)?

Consider a scenario where an iron nail is placed in a solution containing both NaCl and varying concentrations of dissolved oxygen. How would increased salinity and oxygen levels synergistically affect the rate of corrosion?

In the context of preventing iron corrosion, what is the most significant mechanistic difference between using a sacrificial anode (like Zinc) and applying a non-metallic coating (like paint)?

How does the presence of impurities and the microstructure of iron influence its rate of corrosion, and why was the Iron Pillar of Delhi so resistant to corrosion?

Considering the metallurgical process, if an ore sample contains a mixture of Gold (Au), Silver (Ag), and Copper (Cu), what sequence of chemical treatments could selectively extract each metal in a step-wise process?

Suppose a new alloy is designed using varying percentages of nickel, chromium, and molybdenum in an iron matrix. How would you assess the alloy’s overall resistance to corrosion in marine environments characterized by high chloride concentrations and varying pH levels?

When a new metalloid is discovered, what combination of experimental measurements would be most conclusive in determining whether it should be classified closer to metals or non-metals?

Given the use of Argon in light bulbs, why is its inertness crucial, and what would be the consequence of using a less inert gas like Nitrogen under similar conditions?

In the industrial production of steel, how does the controlled addition of elements like Chromium, Nickel, and Molybdenum alter the resulting alloy's properties, specifically related to tensile strength at elevated temperatures?

Considering the activity series of metals, if you place a strip of aluminum into a copper sulfate solution, what would you observe and what is the underlying electrochemical principle?

Metallurgy is the technology and production of metals in pure form from their ores.

Gold is an example of a metal that is commonly found in a combined state in nature.

Minerals are naturally occurring substances with earthly impurities from which metals can be easily and profitably extracted.

Lustre refers to a metal's ability to be drawn into thin wires.

Steel is a metal that is commonly used in electrical cables.

Oxygen is used in welding and breathing.

Non-metals, like coal, can be beaten into thin sheets when hammered.

Potassium (K) and Sodium (Na) react explosively with diluted Hydrochloric acid (HCl) or Sulfuric acid (H₂SO₄).

Base metals, such as Gold and Platinium, are known for their resistance to oxidation.

Rusting is the oxidation of oxygen in the presence of air and moisture.

Metallurgy is defined as the science and technology of extracting metals from their alloys.

All minerals can be profitably and easily extracted for metals.

The ability of a metal to be drawn into wires is known as malleability.

Non-metals are generally lustrous, similar to metals.

Steel is considered a purer form of iron and is commonly used in utensils.

Graphite, used in lead pencils, is a metal.

In the activity series, copper is more reactive than potassium.

All metals react with dilute acids to evolve hydrogen gas.

Noble metals are generally easily oxidized.

Metalloids are only found on the left side of the periodic table.

Halogens react with non-metals to form salts.

Radon is commonly used in light bulbs to prevent filament oxidation.

Rust is chemically known as anhydrous iron (II) oxide.

Rusting of iron requires the presence of moisture and nitrogen.

Calcium chloride promotes rusting by providing moisture.

Metallic oxides are acidic and turn blue litmus paper red.

Copper corrodes in a similar fashion to iron, weakening the metal significantly.

The Iron Pillar at Qutub Minar remained rust free due to the presence of impurities in the iron.

Welding is the process by which non-metallic pieces join together due to high heat and resolidification.

Heavy metals are defined based on their color and reactivity.

The technology and production of metals in pure form from their ores is called ______.

Naturally occurring minerals from which metals can be extracted profitably and easily are called ______.

[Blank] is the shine or brightness of a metal due to the reflection of light.

[Blank] is the ability of a metal to be beaten into thin sheets.

[Blank] is the ability of a metal to be drawn into wires.

[Blank] is the ability of a metal to withstand longitudinal pull when in wire form.

[Blank] is the ability of a metal to produce a resonant sound when struck.

[Blank] is the ability of a metal to conduct heat and electricity.

A series of metals arranged according to their reactivity is called the ______.

Metals which are rare and precious, like gold and platinum, are known as ______.

The process of extracting metals in their pure form from their ores is known as ______.

Metals like gold, silver, and platinum are often found in a ______ or native state.

Minerals are compounds of various metals found in nature along with earthly ______.

[Blank] are naturally occurring minerals from which metals can be extracted profitably and easily

The ability of a metal to withstand longitudinal pull when in wire form is known as ______.

[Blank] is the property of metals that allows them to produce a resonant sound when struck.

The ability of a metal to conduct heat and electricity is referred to as ______.

Unlike most metals, which are solids, ______ is a metal that exists in a liquid state at room temperature.

[Blank] is a non-metal that is lustrous, which is an exception to the general rule that non-metals are non-lustrous.

The activity series of metals arranges them in order of their ______.

Metals which get oxidized easily are known as ______ metals.

Metals that are rare, precious, and resistant to corrosion, such as gold and platinum, are called ______ metals.

Elements that exhibit properties of both metals and non-metals are classified as ______.

The slow oxidation of iron in the presence of air and moisture, forming hydrated iron(III) oxide, is known as ______.

The process of joining metallic pieces by melting them at high temperatures is known as ______.

In the periodic table, metals are generally found on the ______ side.

[Blank] are non-metals found in Group 17 of the periodic table that react with metals to form salts.

Elements present in Group 18 of the periodic table, which are naturally found as monatomic inert gases, are known as ______ gases.

What is the process of extracting metals from their ores called?

Give an example of a metal that can be found in its native state.

What term is used for naturally occurring minerals from which metals can be profitably extracted?

What is the property of a metal that allows it to be beaten into thin sheets?

What is the property of a metal that allows it to be drawn into wires?

What is the ability of a metal to produce a resonant sound when struck?

Name a metal commonly used in electrical cables.

Name a non-metal used in pencils.

What gas do metals evolve when reacted with dilute acids?

What type of metals get oxidized easily?

What are metals which are rare and precious called?

Are metals found on the left or right side of the periodic table?

Name a halogen used to prevent tooth decay.

What two things are needed for iron to rust?

What is the name for elements that have properties of both metals and non-metals?

Explain why gold is often found in its native state, while iron is typically found in combined states.

How does the arrangement of metals in the activity series inform the displacement reactions that can occur between them?

Describe the essential conditions necessary for the rusting of iron, and explain why each is crucial to the process.

Explain how the malleability and ductility of metals make them suitable for different applications in daily life.

How does the presence of impurities in iron affect its resistance to corrosion, based on the information about the Iron Pillar at Qutub Minar?

Explain why noble gases are used in specific applications like light bulbs and deep-sea diving, based on their properties.

Describe how metalloids, such as silicon, are used in technological applications, relating their utility to their unique electrical properties.

Explain the difference in how iron and copper corrode, and how this affects their structural integrity and appearance.

How does understanding the chemical properties of halogens inform their use in everyday applications like water treatment and preventing tooth decay?

Describe how the differing reactions of metals with dilute acids can be used to classify them, and provide examples.

Explain why the use of galvanized buckets (coated with zinc) is an effective method of preventing rust, referencing the activity series of metals.

How does 'enameling' prevent iron from rusting, and what properties make it suitable for use in cooking utensils?

Explain why oxygen is used in welding, but argon is used in light bulbs, considering the different properties of these two non-metals.

Why is it important to understand the concept of tensile strength when choosing metals for constructing bridges or tall buildings?

Describe how the metallic property of sonority is utilized in musical instruments and why is it important for their function.

Explain why the presence of an oil layer in test tube B (in the rusting experiment) is crucial for ensuring that iron nails do not rust, beyond just the removal of oxygen by boiling the water.

Explain why the Iron Pillar at Qutub Minar has not rusted for 1600 years, considering the fact Iron is a base metal, which get oxidized easily.

Predict how the conductivity of a metalloid like Silicon would change with an increase in temperature, and contrast this with how a typical metal's conductivity would respond to the same change. Briefly explain the underlying reason for the difference.

Explain why it's important to remove earthly impurities from ores when extracting metals.

Explain the difference between a mineral and an ore, and why all ores are minerals, but not all minerals are ores.

Describe how the activity series of metals can be used to predict whether a displacement reaction will occur between a metal and a metal salt solution, and explain the underlying principle.

Why is it crucial to stop air & moisture from contacting iron to prevent rusting, and what are the two general categories of preventing rusting?

Explain why some metals occur in a free or native state, while others are always found in a combined state.

Explain the difference between malleability and ductility, and relate these properties to the electronic structure of metals.