WBJEE 2019 Chemistry Solved Paper

(B)
Term (

ab

v2

) represent energy per mole of gases.
Unit of a (Vander wal’s constant) =

atmliter2

mole2

Unit of b (Vander wals’s constant) =

liter

mole

V = volume of gas per mole =

liter

mole

So

ab

v2

(Unit)=

atmliter2 mole2 × liter mole

( liter mole )2

= (

atmilter

mole

)
It is unit of energy per mole.