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A-LevelChemistryGroup 29701/12 · Feb/Mar 2020 · Q171 Mark

A student investigates calcium nitrate crystals by heating them in the apparatus shown. A colourless gas leaves the apparatus at Y. A flame is held to this gas. Which observations would the student make? [Figure 17.1]

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Alitmus solution: changes to blue, flame at Y: flame burns more brightly
Blitmus solution: changes to blue, flame at Y: flame goes out
Clitmus solution: changes to red, flame at Y: flame burns more brightly
Dlitmus solution: changes to red, flame at Y: flame goes out

✓ Correct answer

C: litmus solution: changes to red, flame at Y: flame burns more brightly

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About this question

Topic
Group 2, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source
A-Level Chemistry, Feb/Mar 2020 Paper 1 Variant 2, question 17.

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