In case of nitrogen, NCl3 is possible but no NCl5 while in …

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Halogens and their Compounds Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 13, 2026

In case of nitrogen, NCl3 is possible but no NCl5 while in case of phosphorus, PCl3 as well as PCl5 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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