Question

Ammonia is a good refrigerant but it shows some disadvantages when used as refrigerant. State the disadvantages.

Answer 1

Disadvantages of ammonia as a refrigerant are as follows:
(i) It is not compatible with copper, so it cannot be used in any system with copper pipes.
(ii) It is poisonous in high concentration although it is easily detectable due to its peculiar smell and since it is less dense than air it goes up in the atmosphere not affecting the life too much on earth.