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CXC CAPE · · Chemistry

Water treatment and analysis
Practice Questions

40 CXC CAPE Chemistry questions on Water treatment and analysis, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Water treatment and analysis.

Try 2 sample questions on Water treatment and analysis

Question 1 · 1 mark · Difficulty 1/3

What does BOD (biochemical oxygen demand) measure?

  1. The oxygen produced by plants in the water
  2. The amount of chlorine needed for disinfection
  3. The hardness of the water
  4. The oxygen used by microorganisms to break down organic matter
Show answer & explanation
✓ Answer: D — The oxygen used by microorganisms to break down organic matter
Award 1 mark. BOD is the mass of oxygen consumed by microbes in a sample over five days in the dark at 20 °C; it indicates organic pollution.
Question 2 · 1 mark · Difficulty 1/3

Why is fluoride added to some public water supplies?

  1. To kill bacteria in the pipes
  2. To soften the water
  3. To reduce tooth decay
  4. To remove its colour
Show answer & explanation
✓ Answer: C — To reduce tooth decay
Award 1 mark. Low concentrations of fluoride strengthen tooth enamel. The amount is kept low because excess fluoride can mottle teeth.
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20 questions · 25 min · free

CXC CAPE Chemistry: Water treatment and analysis FAQ

Is Kramizo free for CXC CAPE students preparing for Chemistry?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Water treatment and analysis practice with other Chemistry topics or even switch to a totally different CXC CAPE subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Water treatment and analysis questions aligned to the official CXC CAPE Chemistry syllabus?
Every question is written against the published CXC CAPE Chemistry specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC CAPE paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC CAPE.
How is Water treatment and analysis typically tested on CXC CAPE Chemistry papers?
Water treatment and analysis appears across multiple question types on real CXC CAPE Chemistry papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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