WAEC Chemistry 2025 Objective — Question 32

Question 32 of 50 from the West African Examinations Council (WAEC) Chemistry 2025 Objective paper, with the correct answer and a full explanation.

A salt that could be prepared by double decomposition is

A. sodium trioxocarbonate (IV)
B. barium trioxonitrate (V)
C. lead (II) trioxonitrate (V)
D. silver chlorideCorrect

Explanation

Silver chloride (AgCl) can be prepared by double decomposition between silver nitrate (AgNO3) and sodium chloride (NaCl) solutions: AgNO3(aq) + NaCl(aq) -> AgCl(s) + NaNO3(aq).

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