Amongst NH3, PH3, AsH3 and SbH3 the one with highest boiling point is:

Question

Amongst NH3, PH3, AsH3 and SbH3 the one with highest boiling point is: (A) NH3 because of lower molecular weight (B) SbH3 because of higher molecular weight (C) PH3 because of H-bonding (D) AsH3 because of lower molecular weight

Tardigrade Admin · Accepted Answer

As molecular weight increases, magnitude of Van der Waal’s force of attraction increases. Therefore, boiling point increases. Though NH3 has strong H-bonding but boiling point of SbH3 is highest due to highest molecular

Q. Amongst $N H_{3}, P H_{3}, A s H_{3}$ and $S b H_{3}$ the one with highest boiling point is:

$N H_{3}$ because of lower molecular weight

$S b H_{3}$ because of higher molecular weight

$P H_{3}$ because of $H$ -bonding

$A s H_{3}$ because of lower molecular weight

As molecular weight increases, magnitude of Van der Waal’s force of attraction increases. Therefore, boiling point increases. Though $N H_{3}$ has strong $H$ -bonding but boiling point of $S b H_{3}$ is highest due to highest molecular

Q. Amongst NH3​,PH3​,AsH3​ and SbH3​ the one with highest boiling point is:

NH3​ because of lower molecular weight

SbH3​ because of higher molecular weight

PH3​ because of H-bonding

AsH3​ because of lower molecular weight