A) \[BC{{l}_{3}}\] is a planar molecule whereas \[NC{{l}_{3}}\] has a lone pair of electrons
B) \[B-Cl\]bond is more polar than\[N-Cl\]bond
C) nitrogen atom is smaller than boron atom
D) N-Cl bond is more covalent than \[B-Cl\] bond
Correct Answer: A
Solution :
In \[BC{{l}_{3}},B\]is \[s{{p}^{2}}-\]hybridised and no lone pair on B-atom. But in \[NC{{l}_{3}}\,N\]is \[s{{p}^{3}}-\]hybridised with one lone pair of electron. \[\therefore \]\[BC{{l}_{3}}\] is a planar molecule and\[NC{{l}_{3}}\]is pyramidal,
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