Question

The metal that can be purified economically by fractional distillation method is ______.

विकल्प

• Ni

• Cu

• Zn

• Fe

Answer 1

The metal that can be purified economically by fractional distillation method is Zn.

Explanation:

The fractional distillation process purifies a metal by using the difference in boiling points between the metal and its impurities. Spelter is the name for the unprocessed zinc, which is soft and has a low melting and boiling point.

When heated over its boiling point, unrefined zinc vaporises, and this metal can be obtained in its purest form by condensing the vapours. The higher boiling point contaminants like Cd, Fe, and Pb in crude zinc can be removed since they do not vaporise during distillation.

Therefore, the metal that can be purified economically by fractional distillation method is zinc.