Chemistry - Metallurgy Question with Solution | TestHub

Nickel forms a volatile compound with carbon monoxide.
$\underset{\left(\text{Impure}\right)}{\text{Ni}}\text{+4CO}\stackrel{\text{Δ}}{\to }{\text{[Ni(CO)}}_4]\stackrel{\text{Δ/High temperature}}{\to }\underset{\text{Pure}}{\text{Ni}}\text{+4CO}$