Chemistry · Oct / Nov 2019 · Paper 12 · Question 20
5070Identification of ions and gases
Which statement about ammonia is correct?
- AIt is a colourless, odourless gas.
- BIt is a gas that turns damp blue litmus paper red.
- CIt is formed when potassium nitrate is heated with aqueous sodium hydroxide and aluminium.
- DIt is manufactured using vanadium(V) oxide as a catalyst.
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Correct answer: C. It is formed when potassium nitrate is heated with aqueous sodium hydroxide and aluminium.
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