Question

The bond angle in $P{H}_3$ is:

• A. much lesser than $N{H}_3$
• B. equal to that in $N{H}_3$
• C. much greater than in $N{H}_3$
• D. slightly more than in $N{H}_3$

Answer 1

The correct option is A much lesser than $N{H}_3$

As electronegativity of $P$ is much lower than $N$, so in $N{H}_3$ nitrogen attracts all bond electron towards the centre and electron-electron repulsion is higher so it has a higher bond angle. Bond angle in ammonia is 107 & that in phosphene is 93.5.