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4.2 Identifying the products of chemical reactions

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Question 42
F

A water company tests thousands of water samples each day for sodium ions.

It uses flame emission spectroscopy, where an instrument measures the light given out by a sample in a flame, instead of doing flame tests by eye.

What is the best reason for this?

[1]
A

Flame emission spectroscopy uses cheaper equipment than flame tests.

B

Flame emission spectroscopy does not need the sample to go in a flame.

C

Flame emission spectroscopy is rapid and can detect low concentrations.

D

Flame emission spectroscopy turns the ions into a coloured precipitate.

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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