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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 molecule having the largest bond angle is
  • ✓
    $H_2O$
  • B
    $H_2S$
  • C
    $H_2Se$
  • D
    $H_2Te$
✓

Answer

Correct option: A.
$H_2O$
a
As the electronegativity of the central atom decreases, the repulsions between element-hydrogen bond pairs decreases and hence the angle decreases accordingly. Thus, $H _2 O$ has the largest bond angle $\left(104.5^{\circ}\right)$.

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