In case of nitrogen, NCl 3 is possible but no NCl 5 while i…

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) JEE (Main) / AIEEE Problems (Previous Year) Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

In case of nitrogen, NCl 3 is possible but no NCl 5 while in case of phosphorus, PCl 3 as well as PCl 5 are possible. It is due to :

availability of vacant d-orbital in P but not in N.

lower electronegativity of P then N.

lower tendency of H bond formation in P than N.

occurrence of P in solid while N in gaseous state at room temperature.

Text Solution

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The correct answer is:

In phosphorous the vacant 3 d-orbitals are available. So it can increase its covalence beyond three.

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