Question

The correct sequence of decrease in the bond angles of the following hydrides is

• A. $NH_3 > PH_3 > AsH_3 > SbH_3$
• B. $NH_3 > AsH_3 > PH_3 > SbH_3$
• C. $SbH_3 > AsH_3 > PH_3 > NH_3$
• D. $PH_3 > NH_3 > AsH_3 > SbH_3$

Answer 1

Answer: (A)

$NH_3 > PH_3 > AsH_3 > SbH_3$

Answer 2

In similar molecules, as the electronegativity of the central atom decreases and the size increases, the bond angle decreases