MCQs on METALLURGY

1. Which of the following metals is extracted by the electrolytic reduction process?
(a) Iron
(b) Copper
(c) Aluminum
(d) Zinc

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Answer: (c) Aluminum

2. Which of the following is used as a reducing agent in the extraction of iron from its ore?
(a) Carbon monoxide
(b) Carbon dioxide
(c) Sulfur dioxide
(d) Nitrogen dioxide

Answer: (a) Carbon monoxide

3. The process of converting an ore into its oxide by heating it strongly in the presence of excess air is known as:
(a) Roasting
(b) Smelting
(c) Calcination
(d) Reduction

Answer: (a) Roasting

4. Which of the following is the main reducing agent in the extraction of copper from its ore?
(a) Carbon
(b) Hydrogen
(c) Coke
(d) Iron

Answer: (c) Coke

5. The process of heating an ore in the absence of air below its melting point is called:
(a) Roasting
(b) Smelting
(c) Calcination
(d) Reduction

Answer: (c) Calcination

6. Which of the following is the most abundant metal in the Earth’s crust?
(a) Iron
(b) Aluminum
(c) Copper
(d) Zinc

Answer: (b) Aluminum

7. Which of the following metals is obtained by the Hall-Heroult process?
(a) Iron
(b) Copper
(c) Aluminum
(d) Zinc

Answer: (c) Aluminum

8. Which of the following metals is extracted by the cyanide process?
(a) Silver
(b) Gold
(c) Lead
(d) Nickel

Answer: (b) Gold

9.Which of the following processes is used for the extraction of aluminum from bauxite? (a) Roasting (b) Calcination (c) Hall-Heroult process (d) Smelting

Answer: (c) Hall-Heroult process

10.The reduction of metal oxides to metal is thermodynamically feasible if the Gibbs free energy change (ΔG) is: (a) Positive (b) Negative (c) Zero (d) None of the above

Answer: (b) Negative

11.Which of the following is an example of a pyrometallurgical process? (a) Electrorefining (b) Electroplating (c) Roasting (d) Hydrometallurgy

Answer: (c) Roasting

12.Which of the following elements is commonly used as a reducing agent in the extraction of metals? (a) Oxygen (b) Carbon (c) Hydrogen (d) Chlorine

Answer: (b) Carbon

13.The process of converting an ore into its oxide by heating it strongly in the absence of air is called: (a) Reduction (b) Oxidation (c) Calcination (d) Smelting

Answer: (c) Calcination

14.Which of the following metals is extracted by the Mond process? (a) Zinc (b) Nickel (c) Copper (d) Iron

Answer: (b) Nickel

15.The reaction of a metal oxide with carbon monoxide to produce the metal and carbon dioxide is known as: (a) Roasting (b) Calcination (c) Reduction (d) Smelting

Answer: (c) Reduction

16.Which of the following metals is obtained by the electrolysis of a molten salt? (a) Silver (b) Gold (c) Sodium (d) Mercury

Answer: (c) Sodium

17.The process of separating impurities from a metal by forming a fusible slag is called: (a) Refining (b) Roasting (c) Smelting (d) Electrolysis

Answer: (a) Refining

18.The method used for the extraction of highly reactive metals like sodium and potassium is: (a) Electrolysis (b) Carbon reduction (c) Smelting (d) Roasting

Answer: (a) Electrolysis

These are a few examples of NEET– JEE level MCQs on metallurgy. Make sure to study the topic thoroughly and practice solving more questions to enhance your understanding.