p-Block Elements · JEE Main previous year questions

2002 1 question

1. Q2212002 · 27 Apr 2002 · Shift 1

   In case of nitrogen, $\mathrm{NC}{\mathrm{l}}_3$ is possible but not NCl5 while in case of phosphorous, $\mathrm{PC}{\mathrm{l}}_3$ as well as $\mathrm{PC}{\mathrm{l}}_5$ are possible. It is due to :

   1. A.availability of vacant d orbitals in P but not in N
   2. B.lower electronegativity of P than N
   3. C.lower tendency of H - bond formation in P than N
   4. D.occurrence of P in solid while N in gaseous state at room temperature
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   Answer: A