Chemistry 5070 · O Level · Identification of ions and gases

Identification of ions and gases — practice question

When solid Q is added to dilute hydrochloric acid, it gives off a gas that makes limewater turn milky. If solid Q is warmed with aqueous sodium hydroxide, another gas is released that turns damp red litmus paper blue. What is solid Q?

  • Aammonium carbonate
  • Bammonium nitrate
  • Ccalcium carbonate
  • Dcalcium nitrate

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