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5 marksWater

CAPE Chemistry Unit 2 · 2017 · Paper 2 · Question 3(c)

A student is required to test a water sample for various pollutants using simple laboratory reagents.

Complete Table 1 by inserting the relevant test and inferences to identify the pollutants.

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Other parts of this question

  1. 3(a)(i)State the reason why the presence of ozone in the stratosphere is beneficial to humans.[1 mark]
  2. 3(a)(ii)Write the relevant equations showing the formation of ozone in the stratosphere.[4 marks]
  3. 3(b)(i)List TWO harmful effects of tropospheric ozone on humans.[2 marks]
  4. 3(b)(ii)Describe, with relevant equations, the production of tropospheric ozone resulting from the use of internal combustion engines.[3 marks]

More practice: the rest of this paper · more Water questions · all CAPE Chemistry Unit 2 past papers