Q23 / 118 · NTA Abhyas (NEET) 2020 · Chemistry · States of Matter

The compressibility factor of a gas is less than unity at STP. Therefore

A
Vm > 22.4 litres
Correct answer
B
Vm < 22.4 litres
C
Vm = 22.4 litres
D
Vm = 44.8 litres

Solution

Z = P V / n R T

Given Z < 1

P V / n R T < 1

or

P V < n R T

(1 a t m) \times V < 1 m o l \times (0.0821 L a t m K^{- 1} m o l^{- 1}) \times (273 K)

V_{m} < 0.0821 \times 273 L

V_{m} < 22.4 L

Hence, the correct answer is option: 'B'.

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