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4.2 Identifying the products of chemical reactions

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Question 8

A chloride solution is electrolysed. A gas is collected at the positive electrode and tested using blue litmus paper.

Which observation identifies the gas?

[1]
A

Damp blue litmus paper turns red and stays red.

B

Damp blue litmus paper turns red and then white.

C

Dry blue litmus paper turns red and then white.

D

Damp blue litmus paper stays blue and is not bleached.

Markscheme

4.2 Identifying the products of chemical reactions Questions

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

107 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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