Exams › NEET › Chemistry

Consider the molecules CH4, NH3 and H2O. Which of the given statements is false?

1. The H−C−H bond angle in CH4, the H−N−H bond angle in NH3, and the H−O−H bond angle in H2O are all greater than 90°
2. The H−O−H bond angle in H2O is larger than the H−C−H bond angle in CH4
3. The H−O−H bond angle in H2O is smaller than the H−N−H bond angle in NH3
4. The H−C−H bond angle in CH4 is larger than the H−N−H bond angle in NH3

Correct answer: The H−O−H bond angle in H2O is larger than the H−C−H bond angle in CH4

Solution

The bond angle in CH4 (109.5°) is larger than in NH3 (107°), and the bond angle in NH3 is larger than in H2O (104.5°). Thus, statement B is false as the H−O−H bond angle in H2O is not larger than the H−C−H bond angle in CH4.

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