Question

Formation of $Ni(CO{)}_4$ and subsequent its decomposition into Ni and CO (recycled) makes the basis of Mond's process $Ni+4CO\stackrel{T_1}{\to }Ni(CO{)}_4\stackrel{T_2}{\to }Ni+4CO$

$T_1$ and $T_2$ are:

• A. ${100}^{\circ }C$, ${50}^{\circ }C$
• B. ${50}^{\circ }C$, ${100}^{\circ }C$
• C. ${50}^{\circ }C$, ${230}^{\circ }C$
• D. ${230}^{\circ }C$, ${50}^{\circ }C$

Answer 1

The correct option is C ${50}^{\circ }C$, ${230}^{\circ }C$

Mond process is used for the refining of nickel.
Nickel is heated with CO to form highly volatile nickel tetracarbonyl.
it is then decomposed to pure nickel at high temperature.
$Ni+4CO\stackrel{{50}^{\circ }C}{\to }Ni(CO{)}_4\stackrel{{230}^{\circ }C}{\to }Ni+4CO$

Thus $T_{1}and{T}_2$ are ${50}^{\circ }Cand{230}^{\circ }C$ respectively.