Question

Carbon monoxide forms volatile compound with

• A. Ni
• B. Cu
• C. Al
• D. Si

Answer 1

Answer: (A)

Nickel $(Ni)$ on heating in a stream of carbon monoxide forms a volatile complex, that is nickel tetracarbonyl.
$\underset{\text{Nickel}}{\mathrm{Ni}}+$ $\underset{\text{Carbon monoxide}}{\mathrm{HCO}}\stackrel{330-350\mathrm{K}}{\to }$ $\underset{\text{Nickel tetracarbonyl (volatile compound)}}{[\mathrm{Ni}(\mathrm{CO}){}_4]}$