When a compressed gas is allowed to expand through a small orifice, cooling effect is caused if
(A) The temperature of the gas is less than the inversion temperature
(B) The temperature of the gas is greater than the inversion temperature
(C) The temperature of the gas is equal to the critical temperature
(D) The temperature of the gas is 273 K
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A) temperature of the gas is less than the inversion temperature .As seen in air conditioner they also work on this principle.
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