Metallurgy — Practice Quiz
Maharashtra Board · Class 10 · Science
Try a 4-question quiz on Metallurgy for Maharashtra Board Class 10 Science: tap an answer to check it and see why. 45 questions in the full chapter test.
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Quick Quiz: Metallurgy
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Which of the following is a physical property of metals?
Which nonmetal exists in liquid state at room temperature?
In the reactivity series, which metal is more reactive than iron?
What is the main ore of aluminium?
Sample Questions
Which of the following reactions occur when sodium reacts with water? (Select all correct answers)
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Hydrogen gas is produced, Sodium hydroxide is formed, Heat is evolved
When sodium reacts with water, it forms sodium hydroxide and hydrogen gas with evolution of heat. The reaction is: 2Na + 2H₂O → 2NaOH + H₂ + heat. No oxygen gas is produced, and the reaction is rapid and vigorous.
True or False: Ionic compounds conduct electricity in solid state.
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False
Ionic compounds cannot conduct electricity in solid state because ions are fixed in their positions and cannot move freely. They conduct electricity only in molten or dissolved state when ions become mobile.
Which methods are used for concentration of ores? (Select all correct answers)
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Magnetic separation, Froth floatation, Hydraulic separation, Leaching
Magnetic separation, froth floatation, hydraulic separation, and leaching are all methods used for concentration of ores to separate gangue from valuable minerals. Electrolysis is used for extraction of metals, not concentration of ores.
What happens when iron nail is placed in copper sulphate solution?
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Copper is deposited on iron nail
Iron being more reactive than copper displaces copper from copper sulphate solution. The reaction is: Fe + CuSO₄ → FeSO₄ + Cu. Copper gets deposited on the iron nail.
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