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Calcination

Assertion :Ro...

Question

Assertion :Roasting is a process in which the ore is heated strongly in absence of air. Reason: Concentration of sulphide ore is done by calcination.

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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C

Assertion is correct but Reason is incorrect

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D

Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
In roasting, the ore is heated in a regular supply of air in a furnace at a temperature below the melting point of the metal.
Concentration of sulphide ore is done by Froth floatation process.
Hence,both assertion and reason are incorrect.

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