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Chemical Bonding And Molecular Structure

Question
CBSEENCH11005740

Is there any change in the hybridisation of B and N atoms as a result of the following reaction?
BF3 + NH3 → F3B.NH3?

Solution
In BF3, B is sp2 hybridised and in NH3, N is sp3 hybridised. After the reaction, hybridization of B changes to sp3 but that of N remains unchanged.