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  • Assertion: Nickel can be purified by the Mond process. Reason: Ni(CO)_{4} is a volatile compound which decomposes at 460K to give pure Ni.

In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion: Nickel can be purified by Mond process.

Reason: Ni(CO)_{4} is a volatile compound which decomposes at 460K to give pure Ni.

(i) Both assertion and reason are true and the reason is the correct explanation of assertion.

(ii) Both assertion and reason are true but the reason is not the correct explanation of assertion.

(iii) The assertion is true but the reason is false.

(iv) The assertion is false but the reason is true.

(v) Assertion and reason both are wrong.

Answers (1)

The answer is the option (i). For Mond’s process, the pre-requisites include:

(i) A volatile compound should be formed by the metal on reaction with an available reagent.
(ii) The volatile compound formed should be easily decomposable, enabling the metal to be easily recovered.

Ni(CO)_{4} is a volatile compound which decomposes to give pure nickel on heating at 460 K while CO (Carbon monoxide) is removed as gas.

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