Question

Impure

\[\ce{Ni + 4CO ->[(60-80)°C] Ni(CO)₄ ->[180°C] Ni + 4CO}\]

The above process of purification of the metal is known as-

विकल्प

• Van - Arkel process 

• Pyrometallurgy 

• Mond process 

• Zone refining

Answer 1

Mond process

Explanation:

Mond's technique, which involves treating impure nickel with CO to create the volatile complex known as nickel tetracarbonyl, purifies Ni. When heated at a high temperature, it breaks down into pure nickel and CO.