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Critical temperatures for A, B, C and D gases are 25°C, 10°C, -80°C and 15°C respectively. Which gas will be liquefied more easily ?

(a) A

(b) B

(c) C

(d) D

1 Answer

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Best answer

Correct option  (a) A

Explanation:

Critical temperature of gas may be defined as that temperature above which it cannot be liquetied howsoever high pressure may be applied on the gas.

where a = van der Waals'constant which is a measure of intermoleular forces of attraction. Greater the value of a more easily the gas can be liquefied and hence larger TC mean larger the value of a.

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