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Assertion: Calcination is the process of heating a metal ore in the absence of air to convert it into its oxide.
Reasoning: Calcination helps in the removal of volatile impurities and moisture from the ore, leaving behind the metal oxide.
Both assertion and reasoning are correct, and the reasoning is the correct explanation of the assertion.
Both assertion and reasoning are correct, but the reasoning is not the correct explanation of the assertion.
The assertion is correct, but the reasoning is incorrect.
The assertion is incorrect, but the reasoning is correct.
Answers (1)
The assertion is correct. Calcination is a thermal treatment process that involves heating a substance, typically an ore, in the absence of air or in a limited oxygen environment. The purpose of calcination is to bring about a decomposition or transformation of the substance through the application of heat. In the case of metal ores, calcination is often used to convert the ore into its oxide form.
The reasoning is partially correct but does not provide a complete explanation of the assertion. While calcination does help in the removal of volatile impurities and moisture from the ore, it is not the primary purpose of the process. The main objective of calcination is to induce chemical changes in the ore, such as the conversion of metal carbonates or hydroxides to metal oxides.
During calcination, the ore is heated to a specific temperature that is sufficient to drive off volatile components, such as water, carbon dioxide, or sulfur dioxide, and to cause the desired chemical reactions to occur. The removal of volatile impurities and moisture is a beneficial side effect of the process but not its main purpose.
Therefore, the correct option is (2) Both assertion and reasoning are correct, but the reasoning is not the correct explanation of the assertion.
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