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Consider the following metallurgical pro...

Consider the following metallurgical processes in
1. Heating impure metal with `CO` and distilling the resulting volatile carbonyl boiling point `43^@C` and finally decomposing at `150^@` to `200^@C` to get the pure metal.
II. Heating the sulphide ore in air until a part is converted to oxide and then further heating in the absence of air to let the oxide react with unchanged sulphide.
III. Electrolysing the molten electrolyte containing approximately equal amounts of the metal chloride and `CaCl_2` to obtain the metal. The processes used for obtaining sodium, nickel and copper are respectively

A

I, II and III

B

II, III and I

C

III, I and II

D

II, I and III

Text Solution

Verified by Experts

The correct Answer is:
C
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