Ncert Exercises & Solutions

Match the items in Column I with the items in Column II and assign the correct code.

Column I	Column II
A. Coloured Bands	1. Zone refining
B. Impure metal to volatile complex	2. Fractional distillation
C. Purification of Ge and Si	3. Mond’s process
D. Purification of mercury	4. Chromatography
	5. Liquation

Codes

Hint: Purification of mercury is done by fractional distillation.

A. Coloured bands are observed in chromatography.

B. Impure metal is converted to a volatile complex by using Mond’s process.

C. Purification of Ge and Si is purified by the zone refining method. This method is very useful for producing semiconductors and

other metals of very high purity, e.g., germanium, silicon, boron, gallium and indium.

D. Purification of mercury is done by fractional distillation. This is very useful for low boiling metals like zinc and mercury.

The impure metal is evaporated to obtain the pure metal as distillate.