Question

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`.

Answer 1

(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`.