WAEC Chemistry 2021 Objective — Question 15
Question 15 of 50 from the West African Examinations Council (WAEC) Chemistry 2021 Objective paper, with the correct answer and a full explanation.
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15. The most common method of preparing insoluble salts is by
- A. filtration.
- B. decomposition.
- C. neutralization.
- D. double decomposition.Correct
Explanation
Insoluble salts like AgCl are commonly prepared by double decomposition (precipitation) reactions, e.g. NaCl + AgNO3 → AgCl + NaNO3.
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