O-LevelChemistryAcids, Bases & Salts5070/12 · May/June 2016 · Q11 Mark

Which row correctly identifies the gas?

ACl2 damp litmus paper the litmus paper turns blue

BNH3 damp litmus paper the litmus paper turns red

CO2 limewater no change is observed

DSO2 acidified aqueous potassium manganate(VII) the colour of the solution changes from purple to colourless

✓ Correct answer

D: SO2 acidified aqueous potassium manganate(VII) the colour of the solution changes from purple to colourless

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2016 Paper 1 Variant 2, question 1.

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