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please give explanation for ur answer. i have attached thequestion. please answer the twelfth question immediately

please give explanation for ur answer. i have attached thequestion. please answer the twelfth question immediately

Question Image
Grade:11

1 Answers

DR STRANGE
212 Points
3 years ago
In case o BF3 there is back bondingso double bond characteristic is present and hence bond length is shorten.
but when it forms adduct there is no scope for backbonding hence bond length increases!
so the CORRECT answer is OPTION A

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