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BX(3)+NH(3) overset(B.T.) to BX(3) *NH(3...

`BX_(3)+NH_(3) overset(B.T.) to BX_(3) *NH_(3)`+Heat of adduct formation `(DeltaH)`
The numberical value of `DeltaH` is found to be maximum for:

A

`BF_(3)`

B

`BC l_(3)`

C

`B Br_(3)`

D

`BI_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
Lewis acidic strength: `BF_(3) lt BCl_(3) lt B B r_(3) lt BI_(3)`
As `BI_(3)` is strongest lewis acid among all boron halides therefore, heat of adduct formation will be maximum numerically, for `BI_(3)`.
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