A) \[N-Cl\] bond is more covalent than\[B-Cl\] bond
B) the atom of nitrogen is smaller than boron
C) \[B-Cl\]bond is more polar than\[N-Cl\]bond
D) in\[BC{{l}_{3}}\]unpaired electron pair is not present while in\[NC{{l}_{3}}\]a unpaired electron pair is present.
Correct Answer: D
Solution :
In\[BC{{l}_{3}}\]unpaired electron pair is not present in boron and\[BC{{l}_{3}}\]is in\[s{{p}_{2}}\]hybridised state hence it is a planar molecule while in\[NC{{l}_{3}},\]unpaired electron pair is present in nitrogen and it is in \[s{{p}_{3}}\]hybridised state hence its structure is pyramidal.
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