Analysis of inorganic compounds Quiz
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5 questions, one answer each
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1. Dilute acid is added to a solid and a gas that turns limewater milky is produced. The solid contains:
- A. Sulfate ions
- B. Ammonium ions
- C. Chloride ions
- D. Carbonate or hydrogencarbonate ions
2. Which test gives a white precipitate for sulfate ions?
- A. Limewater
- B. Sodium hydroxide and warming
- C. Acidified barium chloride
- D. Acidified silver nitrate
3. What is the observation when ammonium chloride is warmed with sodium hydroxide?
- A. Limewater turns milky
- B. A white precipitate forms
- C. Damp blue litmus turns red
- D. Damp red litmus turns blue
4. Why is dilute hydrochloric acid not used to acidify a sample before the silver nitrate test?
- A. It reacts with silver nitrate to give a gas
- B. It adds chloride ions
- C. It dissolves silver chloride
- D. It oxidises halide ions
5. Which ionic equation represents the reaction of ammonium ions with hydroxide ions?
- A. NH₃ + H₂O → NH₄⁺ + OH⁻
- B. NH₄⁺ + OH⁻ → NH₃ + H₂O
- C. NH₄⁺ + H⁺ → NH₅²⁺
- D. NH₄⁺ + Cl⁻ → NH₄Cl