Q.
The correct order of normal boiling points of O2,N2,NH3 and CH4 for whom the values of van der Waals constant 'a' are 1.360,1.390,4.170 and 2.253L2 atm mol−2 respectively, is:
van der Waal's constant 'a' depicts the correction of intermolecular forces. Higher the value of ' a ' stronger the intermolecular force.
The order of normal boiling points : O2<N2<CH4<NH3.