QJEEM11Ch5de3: JEE Main 2011 Chemistry - Class 11 JEEM11Ch5de3 Solution: 'a’ and `b’ are van der Waals’ constants for gases. Chlorine is …

Question

Verified Solution • 2025–26 Session moderate

'a’ and `b’ are van der Waals’ constants for gases. Chlorine is more easily liquefied than ethane because

Accepted Answer

The value of

a

is a measure of the magnitude of the attractive forces between the molecules of the gas. Greater the value of

^{'} a^{'},

larger is the attractive inter-molecular force between the gas molecules.

The value of

b

related to the effective size of the gas molecules. It is also termed as excluded volume.

The gases with higher value of

a

and lower value of

b

are more liquefiable, hence for

C l_{2}

^{″} a^{‴}

should be greater than for

C_{2} H_{6}

but for it

b

should be less than for

C_{2} H_{6} .

Step-by-Step Verified Solution