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WAEC Chemistry 2021 Objective — Question 8

Question 8 of 50 from the West African Examinations Council (WAEC) Chemistry 2021 Objective paper, with the correct answer and a full explanation.

8. Which of the following pairs of compounds would form a precipitate when their aqueous solutions are mixed?

A. NaCl and KNO3
B. KCl and NaNO3
C. K2SO4 and BaCl2Correct
D. NH4NO3 and Na2CO3

Explanation

Mixing K2SO4 and BaCl2 produces insoluble BaSO4, a white precipitate.

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