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Chemistry · Oct / Nov 2025 · Paper 12 · Question 20

5070Preparation of salts

Which pair of substances are both insoluble in water?

  1. Aammonium chloride and ammonium carbonate
  2. Bcopper carbonate and copper hydroxide
  3. Clead nitrate and lead chloride
  4. Dzinc sulfate and zinc hydroxide

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Correct answer: B. copper carbonate and copper hydroxide

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