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6.3 Interpreting and interacting with earth systems

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Question 18
F

A sample of tap water from a water treatment works is tested.

TestResult
Evaporate 1 dm31\ \mathrm{dm^{3}}1 dm3 of the water to dryness0.3 g of solid left
Test for harmful microorganismsnone detected
Levels of dissolved substancesall within safe limits

Which conclusion is best supported by the results?

[1]
A

The water is potable and pure.

B

The water is potable but not pure.

C

The water is not potable, because it contains dissolved substances.

D

The water is pure but not potable.

Markscheme

6.3 Interpreting and interacting with earth systems Questions

  1. GCSE
  2. /Chemistry
  3. /6.3 Interpreting and interacting with earth systems

51 exam-style questions on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one has a worked solution and a mark scheme showing where the marks go.

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