Question

The Mond process is used for the:

• A. Extraction of $Mo$
• B. Purification of $Ni$
• C. Purification of $Zr$ and $Ti$
• D. Extraction of $Zn$

Answer 1

The correct option is B Purification of $Ni$

Mond's process is used for purification of $Ni$
Vapour Phase Refining
Step 1:
Ni is heated in stream of $CO$ to form nickel tetracarbonyl
$Ni+4CO\stackrel{330-350K}{\to }\underset{\text{Volatile}}{Ni(CO{)}_4}$
Step2:
Volatile compound is subjected to higher temperature
$Ni(CO{)}_4\stackrel{450-470K}{\to }\underset{\text{Pure metal}}{Ni}+4CO$