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4.2 Identifying the products of chemical reactions

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Question 16

A student collects two gases in separate test tubes.

Gas R is given off by pondweed in a beaker of water placed in bright light.

Gas S is given off when zinc is added to dilute sulfuric acid.

Which option gives a test result that would identify each gas?

[1]
A

Gas R relights a glowing splint; gas S turns limewater milky.

B

Gas R turns limewater milky; gas S turns limewater milky.

C

Gas R relights a glowing splint; gas S gives a squeaky pop with a lit splint.

D

Gas R turns limewater milky; gas S gives a squeaky pop with a lit splint.

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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