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4.2 Identifying the products of chemical reactions

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Question 2
F

A student electrolyses concentrated sodium chloride solution using inert electrodes.

The student collects the gas made at each electrode and tests it.

Which option shows the positive test result for the gas at each electrode?

[1]
A

Anode gas relights a glowing splint; cathode gas gives a squeaky pop with a lit splint

B

Anode gas gives a squeaky pop with a lit splint; cathode gas bleaches damp blue litmus paper

C

Anode gas bleaches damp blue litmus paper; cathode gas gives a squeaky pop with a lit splint

D

Anode gas bleaches damp blue litmus paper; cathode gas relights a glowing splint

Markscheme

4.2 Identifying the products of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /4.2 Identifying the products of chemical reactions

52 exam-style questions on OCR GCSE Chemistry 4.2 Identifying the products of chemical reactions, covering 4.2.1 Tests to identify gases, 4.2.2 Tests for aqueous ions and flame tests, and 4.2.3 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.

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