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Froth Floatation

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Question

In which among the following processes ore is heated in the presence of excess air to convert the sulphide ore into its oxides?

A

Roasting

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B

Calcination

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C

Smelting

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D

Leaching

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Solution

The correct option is A Roasting
Roasting is a process in which ore is heated in the presence of excess of air. As a result of roasting, the sulphide ore is converted into its oxide. Whereas, calcination is a process in which ore is heated in the absence of air. As a result of calcination, the carbonate ore is converted into its oxide.

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