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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
Which has the least bond angle
  • A
    $N{H_3}$
  • B
    $Be{F_2}$
  • ✓
    ${H_2}O$
  • D
    $C{H_4}$
✓

Answer

Correct option: C.
${H_2}O$
(c) Due to $lp - lp$ repulsions, bond angle in ${H_2}O$ is lower $({104^o}{.5^o})$ than that in $N{H_3}$$({107^o})$ and $C{H_4}({109^o}28')$. $Be{F_2}$ on the other hand, has $sp-$hybridization and hence has a bond angle of ${180^o}$.

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