Question

the coconut charcoal cooled in liquid nitrogen is used for
a) purification of water
b) separation of dissolved gas
c) production of high vacuum
d) softening of hard water​

Answer 1

Answer:

separation of dissolved gas

Answer 2

OPTION (b) IS CORRECT.

(b) SEPARATION OF DISSOLVED GAS.

Explanation:

• In helium purification system, cooled charcoal in liquid nitrogen is used.
• It is used to remove the dissolved noble gases present as impurities in the coolant stream.
• The charcoal beds remove the fission products much effectively, it is also used to remove the hydrogen from the helium coolant.
• AT low temperature, hydrogen is removed and at very low temperature noble gases are removed.
• Therefore, cooled charcoal in liquid nitrogen is used to separate the dissolved gas. Option (b) is correct.