February/March 2026 Paper 22

2026 · 40 questions · 40 parts · 40 marks

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25Water Chemistry Water TreatmentEasy1 mark
Which statements about the substances in water from natural sources are correct?
  1. 1
    Detergents contain nitrates that cause disease.
  2. 2
    Sewage contains harmful microbes that cause disease.
  3. 3
    All metal compounds are toxic.
  4. 4
    Fertilisers contain nitrates and phosphates which damage aquatic life.