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Which bond is more polar in the followin...

Which bond is more polar in the following pairs of molecules: (a) `H_(3)C-H, H_(3)C-Br` (b) `H_(3)C-NH_(2), H_(3)C-OH` (c) `H_(3)C-OH, H_(3)C-SH`

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(a) `H_3C-Br`, since `Br` is more `EN` than `H`.
(b) `H_3 C-OH`, since `O` is more `EN` than `N`
( c) `H_3C-OH`, since `O` is more `EN` than `S`.
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Which bond is more polar in the following pairs of molecules ? (a) H_3C-H,H_3C-Br , (b) H_3C-NH_2,H_3C-OH ( c) H_3C-OH,H_3C-SH .

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