Question

The decreasing valuse of bond angles from `NH_(3) (106^(@))` to `SbH_(3)(101^(@))` down group -15 of the periodic table is due to .
A. increasing bp-bp repulsion
B. increasing p-orbital character in `sp^(3)`
C. decreasing lp-bp repulsion
D. decreasing electrognegativity

Answer 1

Correct Answer - D
Decreasing order of value of bond angles are `NH_3 gt PH_3 gt AsH_3 gt SbH_3 `
As the electronegativity of central atom increases , bonded electron polarises towards central atom more , so, repulsion increases and bond angle increases .