Q40 / 150 · JEE Main 2006 · Chemistry

The decreasing values of bond angles from $\mathrm{NH}_3\left(106^{\circ}\right)$ to $\mathrm{SbH}_3\left(101^{\circ}\right)$ down group-15 of the periodic table is due to

A
increasing bp-bp repulsion
B
increasing p-orbital character in $\mathrm{sp}^3$
C
decreasing Ip-bp repulsion
Correct answer
D
decreasing electronegativity

Hence, the correct answer is option: 'D'.

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