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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
The polar molecule among the following is
  • A
    $CC{l_4}$
  • B
    $C{O_2}$
  • ✓
    $C{H_2}C{l_2}$
  • D
    $C{H_2} = C{H_2}$
✓

Answer

Correct option: C.
$C{H_2}C{l_2}$
c
$CH _2 Cl _2$ is a polar molecule. The molecule is tetrahedral due to $4$ electron repulsion around the central $C$ atom. Although the bond arrangement around the $C$ atom in $CH _2 Cl _2$ is symmetrical, the differing polarities of the $C - H$ and $C - Cl$ bonds means the effect of the polar bonds is not cancelled, so the molecule is polar.

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