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6.3 Interpreting and interacting with earth systems

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Question 11

An island field laboratory treats collected rainwater and sea water for use as drinking water.

Statement 1: Water that is potable must contain only water molecules.

Statement 2: Leaving muddy rainwater in a sedimentation tank allows particles of sand and soil to collect at the bottom.

Statement 3: In reverse osmosis, dissolved ions pass through the membrane while water molecules are held back.

Statement 4: During distillation of sea water, salts remain in the heated container and condensed water is collected.

Which statements are correct?

[1]
A

2 and 3 only

B

2 and 4 only

C

1 and 4 only

D

1 and 3 only

Markscheme

6.3 Interpreting and interacting with earth systems Questions

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

109 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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