1.

\[PC{{l}_{5}}\] exists but \[NC{{l}_{5}}\]does not because [EAMCET 1977; MP PET/PMT 1988]

A.                 Nitrogen has no vacant d-orbitals
B.                 \[NC{{l}_{5}}\]is unstable
C.                 Nitrogen atom is much smaller
D.                 Nitrogen is highly inert
Answer» B.                 \[NC{{l}_{5}}\]is unstable


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