InterviewSolution
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InterviewSolution
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Which among the following has smallest bond angle ?A. `H_2S`B. `H_2O`C. `NH_3`D. `SO_2` |
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Answer» Correct Answer - A In both `NH_3` and `SO_2`, the central atoms (N and S) carry only one lone pair of electrons while in `H_2S` and `H_2O`, the central atoms (S and O) carry two lone pairs. Due to lone pair-lone pair repulsion, the latter molecules will have smaller bond angles than the former molecules. In similar molecules (`H_2overset(..)S:` and `H_2overset(..)O:`), the bond angle decreases as the size of the central atom increases and its electronegativity decreases. Thus, `H_2S` has the smallest bond angle as sulphur is bigger than oxygen and less electronegative: `H_2S(92.5^@) lt H_2O(104.5^@) lt NH_3(107.5^@) lt SO_2(119^@)` |
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