Question

The correct order of normal boiling points of O2, N2, NH3 and CH4, for whom the values of vander Waal's constant ‘a’ are 1.360, 1.390, 4.170 and 2.253 L2. atm. mol-2 respectively, is :

• A. O2< N2 < NH3 < CH4
• B. O2< N2 < CH4 < NH3
• C. NH3 < CH4< N2< O2
• D. NH3 < CH4< O2< N2

Answer 1

Answer: (B)

O2< N2 < CH4 < NH3

Answer 2

Boiling point $\propto$ a