WAEC Chemistry 2021 Objective — Question 46

Question 46 of 50 from the West African Examinations Council (WAEC) Chemistry 2021 Objective paper, with the correct answer and a full explanation.

46. Which of the following pairs of molecules form hydrogen bonds?

A. C2H5OH and CH3OHCorrect
B. C6H6 and Br2
C. H2S and CH4
D. NH3 and SO2

Explanation

Hydrogen bonding requires H attached to a small, highly electronegative atom (N, O, F). Both C2H5OH and CH3OH have O-H groups, enabling hydrogen bonding between them.

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