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  • Identify the correct statement with respect to calcination of a metal ore? Impurities of S, As and Sb are removed in the form of their volatile oxides. Hydrated salts l

Identify the correct statement with respect to calcination of a metal ore?

  1. Impurities of S, As and Sb are removed in the form of their volatile oxides.
  2. Hydrated salts lose their water of crystallisation.
  3. It makes the ore more porous.
  4. The ore is heated to a temperature when fusion just begins.
Option: 1

A and D only


Option: 2

B only


Option: 3

C only


Option: 4

B and C only


Answers (1)

best_answer

Calcination is the process of heating the ore in the absence of air. Calcination of a metal ore makes it very porous and they lose their water of crystallisation.

Eg.   \mathrm{Fe}_2 \mathrm{O}_3 \cdot \mathrm{XH}_2 \mathrm{O}(\mathrm{s})+\text { Heat } \rightarrow \mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s})+\mathrm{xH}_2 \mathrm{O}(\mathrm{g})

Posted by

Ajit Kumar Dubey

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