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Chemistry of the Environment
Practice Questions

66 CIE IGCSE Chemistry questions on Chemistry of the Environment, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Chemistry of the Environment

Question 1 · 1 mark · Difficulty 1/3

What are the main pollutant gases from burning fossil fuels?

  1. Only water vapour
  2. Only nitrogen
  3. Only CO₂
  4. Carbon dioxide, carbon monoxide, sulfur dioxide, nitrogen oxides, and particulates
Show answer & explanation
✓ Answer: D — Carbon dioxide, carbon monoxide, sulfur dioxide, nitrogen oxides, and particulates
Fossil fuel combustion produces: CO₂ (greenhouse gas), CO (toxic), SO₂ (acid rain), NOx (acid rain, smog), and particulates (soot, health problems).
Question 2 · 1 mark · Difficulty 1/3

What is the approximate percentage by volume of nitrogen in dry air?

  1. 21%
  2. 78%
  3. 0.04%
  4. 1%
Show answer & explanation
✓ Answer: B — 78%
Award 1 mark for identifying nitrogen as approximately 78% of dry air. A is incorrect — 21% is the percentage of oxygen. C is incorrect — 0.04% is the percentage of carbon dioxide. D is incorrect — 1% represents the noble gases (mainly argon).
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20 questions · 25 min · free

CIE IGCSE Chemistry: Chemistry of the Environment FAQ

Is Kramizo free for CIE IGCSE 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 Chemistry of the Environment practice with other Chemistry topics or even switch to a totally different CIE 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 Chemistry of the Environment questions aligned to the official CIE IGCSE Chemistry syllabus?
Every question is written against the published CIE IGCSE Chemistry specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CIE 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 CIE.
How is Chemistry of the Environment typically tested on CIE IGCSE Chemistry papers?
Chemistry of the Environment appears across multiple question types on real CIE IGCSE 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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