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HomeCXC CSEC Integrated ScienceCarbon Chemistry: Hydrocarbons and Organic Compounds
CXC · CSEC · Integrated Science

Carbon Chemistry: Hydrocarbons and Organic Compounds
Practice Questions

20 CXC CSEC Integrated Science questions on Carbon Chemistry: Hydrocarbons and Organic Compounds, 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 Carbon Chemistry: Hydrocarbons and Organic Compounds.

Try 2 sample questions on Carbon Chemistry: Hydrocarbons and Organic Compounds

Question 1 · 1 mark · Difficulty 1/3

A student in a Trinidad laboratory heated a sample of crude oil and collected different fractions at various temperatures. Which property of hydrocarbons allows this separation technique to work?

  1. Different boiling points
  2. Different colours
  3. Different densities
  4. Different solubilities in water
Show answer & explanation
✓ Answer: ADifferent boiling points
Award 1 mark for identifying that fractional distillation separates hydrocarbons based on their different boiling points. B is incorrect — colour is not the basis for separation in distillation. C is incorrect — while densities differ, this is not the principle used in fractional distillation. D is incorrect — hydrocarbons are generally insoluble in water.
Question 2 · 1 mark · Difficulty 1/3

Which of the following is the correct molecular formula for propane?

  1. C₂H₆
  2. C₃H₈
  3. C₃H₆
  4. C₄H₁₀
Show answer & explanation
✓ Answer: BC₃H₈
Award 1 mark for correct formula. Alkanes follow the general formula CₙH₂ₙ₊₂, so propane (n=3) is C₃H₈. A is incorrect — this is ethane (C₂H₆). C is incorrect — C₃H₆ is propene (an alkene). D is incorrect — this is butane.
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CXC CSEC Integrated Science: Carbon Chemistry: Hydrocarbons and Organic Compounds FAQ

How many CXC CSEC Integrated Science questions on Carbon Chemistry: Hydrocarbons and Organic Compounds are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Carbon Chemistry: Hydrocarbons and Organic Compounds for CXC CSEC Integrated Science, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Integrated Science?
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 Carbon Chemistry: Hydrocarbons and Organic Compounds practice with other Integrated Science topics or even switch to a totally different CXC 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 Carbon Chemistry: Hydrocarbons and Organic Compounds questions aligned to the official CXC CSEC Integrated Science syllabus?
Every question is written against the published CXC CSEC Integrated Science specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC 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.
How is Carbon Chemistry: Hydrocarbons and Organic Compounds typically tested on CXC CSEC Integrated Science papers?
Carbon Chemistry: Hydrocarbons and Organic Compounds appears across multiple question types on real CXC CSEC Integrated Science 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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