Consider the molecules CH4,NH3 and H2O. Which of the given statements is false?
A
The H−C−H bond angles in CH4, the H−N−H bond angle in NH3, and the H−O−H bond angle in H2O are all greater than 90∘
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B
The H−O−H bond angle in H2O is larger than the H−C−H bond angle in CH4
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C
The H−O−H bond angle in H2O is smaller than the H−N−H bond angle in NH3
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D
The H−C−H bond angle in CH4 is larger than the H−N−H bond angle in NH3
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Solution
The correct option is C The H−O−H bond angle in H2O is larger than the H−C−H bond angle in CH4 All the three molecules are sp3 hybridised but the bond angles are different due to the presence of lone pair. The bond angle of H2O is 104.5o due to bond pair - lone pair repulsion and the bond angle of CH4 is 109.25o.