JEE Advanced 2020 Full Test 5 Paper 1

Question : 21 of 54

Marks: +1, -0

Identify the incorrect statement (s)?

The ratio of the observed molar volume to ideal volume under similar condition is called compressibility factor.
The value of van der Waals constants 'a' and 'b' is independent of the nature of gas.
At high temperature and low pressure, (P+‌
an2
V2
)(V−nb)=nRT is used to explain the behaviour of any gas.
H2 and He gases are difficult to liquefy because their Critical temperature is very small.

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