The following equation represents a method of purification of nickel by:

$N i + 4 C O (i m p u r e) 320 K \to N i (C O)_{4} 420 K \to N i + 4 C O (p u r e)$

Cupellation

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Mond's process

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Van Arkel method

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Zone refining

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Solution

The correct option is B Mond's process
Mond’s Method
It is specially used for Ni. The Vapour phase refining of Ni on heating in a stream of CO forms Volatile $N i (C O)_{4}$ . These vapours when subjected to still higher temperature, decompose to give pure metal.

$N i + 4 C O 50^{o} - \to N i (C O)_{4} 230^{o} - - \to N i + 4 C O$

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Similar questions

N i (i m p u r e) + 4 C O 320 K - -- \to N i {(C O)}_{4} 420 K - -- \to N i (p u r e) + 4 C O

Which method of purification is represented by the following equations?

$N i + 4 C O$ $70^{\circ} C - -- \to$ $N i (C O)_{4}$ $180^{\circ} C - --- \to$ $N i + 4 C O$

N i, C u, Z r, G a

Which method of purification is represented by the following equations?

$N i + 4 C O$ $70^{\circ} C - -- \to$ $N i (C O)_{4}$ $180^{\circ} C - --- \to$ $N i + 4 C O$

N i, C u, Z r, G a

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