Question

Which bond is more polar in the following pairs of molecules?

(i) H₃C-H, H₃C-Br

(ii) H₃C-NH₂, H₂C-OH

(iii) H₃C-OH, H₃C-SH

Answer 1

(i) C-Br because Br is more electronegative than H.

(ii) C-O because O is more electronegative than N.

(iii) C-O because O is more electronegative than S.