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The decreasing value of bond angles from...

The decreasing value of bond angles from `NH_(3)(106^(@))` to `SbH_(3)(101^(@))` down group-15 of the periodic table is due to

A

decreasing ip-bp repulsion

B

decreasing electronegativity

C

increasing bp-bp repulsion

D

inreasing p-orbital character in `sp^(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
The angle decreases on moving down the group due to decrease in bond pair-bond pair repulsion.
`underset(107^(@))(NH_(3)) " "underset(93.5^(@))(PH_(3))" "underset(91.8^(@))(AsH_(3))" "underset(91.3^(@))(SbH_(3))" "underset(90^(@))(BiH_(3))`
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