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AIIMS 201926 May
Exam
AIIMS
Year
2019
Date
26 May
Subject
Chemistry
Chapter
Chemical Bonding and Molecular Structure

AIIMS 2019 · 26 May · Chemistry · Chemical Bonding and Molecular Structure

Select the correct statement regarding shapes of PCl_5, BrF_5 and...

Select the correct statement regarding shapes of PCl5,BrF5\mathrm{PCl}_5, \mathrm{BrF}_5 and IF7\mathrm{IF}_7.

Options

  1. AAll are square pyramidal.
  2. BAll are trigonal bipyramidal.
  3. COne of the given compounds is square pyramidal.
  4. DOne of the given compounds is tetrahedral.

Correct answer

C. One of the given compounds is square pyramidal.

Step-by-step solution

 (c) : PCl5:bp=5;lp=0 Total =5sp3d (Trigonal bipyramidal) BrF5:bp=5;lp=1 Total =6,sp3d2 (Square pyramidal) \begin{aligned} & \text{ (c) : } \mathrm{PCl}_5: \\ & b p=5 ; l p=0 \\ & \text{ Total }=5 \\ & s p^3 d \\ & \text{ (Trigonal bipyramidal) } \\ & \mathrm{BrF}_5: \\ & b p=5 ; l p=1 \\ & \text{ Total }=6, s p^3 d^2 \\ & \text{ (Square pyramidal) }\end{aligned}\mathrm{IF}_7 : bp=7;lp=0 Total =7sp3d3\begin{aligned} & b p=7 ; l p=0 \\ & \text{ Total }=7 \\ & s p^3 d^3\end{aligned} (Pentagonal bipyramidal)$
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