Assertion: Nickel can be purified

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.

(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.