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6.3 Interpreting and interacting with earth systems

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Question 24
F

Statement 1: Ground water usually needs less treatment than waste water, because it contains less organic matter and fewer microorganisms.

Statement 2: Sea water needs more energy to treat than fresh water, because dissolved salts cannot be removed by filtration.

Statement 3: Chlorination removes the dissolved salts from waste water.

Statement 4: Sea water becomes potable if it is passed through a fine enough filter paper.

Which statements are correct?

[1]
A

1 and 2 only

B

1 and 3 only

C

2 and 4 only

D

1, 2 and 4 only

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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