question_answer

\[N{{H}_{3}}\] has much higher boiling point than \[P{{H}_{3}}\] because

A)  \[N{{H}_{3}}\]has larger molecular weight

B)  \[N{{H}_{3}}\] undergoes umbrella inversion

C)  \[N{{H}_{3}}\] forms hydrogen bond

D)  \[N{{H}_{3}}\]contains ionic bonds whereas \[P{{H}_{3}}\]contains covalent bonds

Correct Answer: C

Solution :

                 Boiling point of ammonia is much higher than phosphine. It is due to extensive hydrogen bonding found in ammonia.