O-LevelChemistryAcids, Bases & Salts5070/12 · Oct/Nov 2020 · Q51 Mark

Aqueous zinc chloride is tested with various reagents. Which observation is correct?

AAqueous ammonia gives a white precipitate which is soluble in excess reagent.

BCopper turnings give a precipitate of zinc.

CAcidified aqueous silver nitrate gives a yellow precipitate.

DAcidified aqueous barium nitrate gives a white precipitate.

✓ Correct answer

A: Aqueous ammonia gives a white precipitate which is soluble in excess reagent.

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2020 Paper 1 Variant 2, question 5.

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