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The correct order of decreasing bond ang...

The correct order of decreasing bond angles in `H_(2)S, NH_(3), BF_(3)` and `SiH_(4)` is

A

`BF_(3) gt SiH_(4) gt H_(2)S gt NH_(3)`

B

`BF_(3) gt SiH_(4) gt NH_(3) gt H_(2)S`

C

`BF_(3) gt NH_(3) gt SiH_(4) gt H_(2)S`

D

`SiH_(4) gt BF_(3) gt NH_(3) gt H_(2)S`

Text Solution

Verified by Experts

The correct Answer is:
B
`BF_(3) gt SiH_(4) gt overset(..)(NH_(3)) gt H_(2)overset(..)(S):`
`((sp^(2)),("hybridised"),(120^(@))) ((sp^(3)),("hybridised"),(109.5^(@))) ((sp^(3)),("hybridised"),("repulsion"),("between"),(lp-lp),(107^(@))) ((sp^(3) "hybridised"),((lp-lp)),("repulsion"),(92.3^(@)))`
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