Metals — Practice Quiz
Kerala Board · Class 10 · Chemistry
Try a 4-question quiz on Metals for Kerala Board Class 10 Chemistry: tap an answer to check it and see why. 45 questions in the full chapter test.
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Quick Quiz: Metals
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Which of the following metals is found in free state in nature?
What is the chemical formula of bauxite, the main ore of aluminium?
Which concentration method is used for sulphide ores?
What is the balanced equation for roasting of zinc sulphide?
Sample Questions
Which of the following are properties of metals? (Select all correct answers)
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Sonority, Malleability, Ductility, Good conductor of heat
Metals have characteristic properties like sonority (producing sound when struck), malleability (can be hammered into sheets), ductility (can be drawn into wires), and good conductivity. They are not brittle and have lustrous appearance.
Which reducing agent is used to extract iron from its oxide ore?
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Carbon monoxide
Carbon monoxide (CO) is used as the reducing agent in blast furnace to extract iron from its oxide ore. The reaction is Fe2O3 + 3CO → 2Fe + 3CO2.
What is the role of limestone in iron extraction?
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Flux to remove impurities
Limestone acts as a flux in iron extraction. It decomposes to form calcium oxide which combines with acidic impurities like silica to form slag that can be easily removed.
Which of the following metals require electrolysis for extraction? (Select all correct answers)
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Sodium, Aluminium, Potassium, Magnesium
Highly reactive metals like sodium, aluminium, potassium, and magnesium form very stable compounds and require electrolysis for extraction. Moderately reactive metals like iron and copper can be extracted by reduction with carbon.
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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