CH-1649
Tests for cations
Chemistry · Secondary 4 · Easy · Tests for cations
A student heats a solid in a test-tube and observes a colourless gas that turns damp red litmus paper blue. Which ion must be present in the solid?
- ammonium, NH₄⁺
- nitrate, NO₃⁻
- carbonate, CO₃²⁻
- sulfate, SO₄²⁻
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