JEE Main 2015 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Main 2015

Not in JEE Main or NEET syllabus

In the isolation of metals, calcination process usually results in:

(1)Metal oxideCorrect
(2)Metal carbonate
(3)Metal sulphide
(4)Metal hydroxide

Answer: (1)

Solution

Calcination is the strong heating of an ore in the *absence or limited supply* of air. It drives off volatile matter — water of hydration, carbon dioxide from carbonates, organic matter — and converts the ore into the oxide. For example, and

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Question ID VK-115272