The value of Van der Waal’s constant ‘a’ for the gases , , and are 1.360, 1.390, 4.170 and 2.253L2 atm mol–2 respectively. The gas which can most easily be liquified is

Question

The value of Van der Waal’s constant ‘a’ for the gases $O_2$, $N_2$, $NH_3$ and $CH_4$ are 1.360, 1.390, 4.170 and 2.253L2 atm mol–2 respectively. The gas which can most easily be liquified is

Prashant Kotian · Accepted Answer

Correct answer: C. The importance of the Van der Waal’s constant a and b is- The constant ‘a’ gives the measure of intermolecular forces of attraction. Gaseous State 21 The constant b gives the measure of molecular size. Critical temperature is the temperature at and above which vapor of the substance cannot be liquified, no matter how much pressure is applied. It is the parameter that tells about the Van der Waal force of attraction. Higher the Van der Waal force of attraction, higher will be its critical temperature and it would be easy to liquefy the gas. Out of given gases, ammonia has higher value of consta

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