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AIIMS 2001
Exam
AIIMS
Year
2001
Subject
Chemistry
Chapter
Chemical Bonding and Molecular Structure

AIIMS 2001 · Chemistry · Chemical Bonding and Molecular Structure

The BCl_3 is a planar molecule where as NCl_3 is pyramidal, because

The BCl3\mathrm{BCl}_3 is a planar molecule where as NCl3\mathrm{NCl}_3 is pyramidal, becauseThe BCl_3 is a planar molecule where as NCl_3 is pyramidal, becauseThe BCl_3 is a planar molecule where as NCl_3 is pyramidal, because

Options

  1. AB−Cl\mathrm{B}-\mathrm{Cl} bond is more polar than N−Cl\mathrm{N}-\mathrm{Cl} bond
  2. BN−Cl\mathrm{N}-\mathrm{Cl} bond is more covalent than B−Cl\mathrm{B}-\mathrm{Cl} bond
  3. Cnitrogen atom is smaller than boron atoms
  4. DBCl3\mathrm{BCl}_3 has no lone pair but NCl3\mathrm{NCl}_3 has a lone pair of electrons.

Correct answer

D. BCl3\mathrm{BCl}_3 has no lone pair but NCl3\mathrm{NCl}_3 has a lone pair of electrons.

Step-by-step solution

The BCl_3 is a planar molecule where as NCl_3 is pyramidal, because
No lone pair of electron is available in BCl3\mathrm{BCl}_3.The BCl_3 is a planar molecule where as NCl_3 is pyramidal, because
One lone pair of electron is available on N-atoms, it occupies a corner in the tetrahedral arrangement. Therefore, NCl3\mathrm{NCl}_3 appears pyramidal in shape.
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