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CXC · CSEC · Chemistry

Chemical Formulae and Nomenclature
Practice Questions

20 CXC CSEC Chemistry questions on Chemical Formulae and Nomenclature, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Chemical Formulae and Nomenclature

Question 1 · 1 mark · Difficulty 1/3

A student in a Jamaican laboratory was asked to write the chemical formula for aluminum oxide, a compound extracted during bauxite processing. Which formula is correct?

  1. AlO
  2. Al₂O₃
  3. Al₃O₂
  4. AlO₂
Show answer & explanation
✓ Answer: BAl₂O₃
Award 1 mark for recognizing that aluminum has a valency of 3+ and oxygen 2-, requiring the formula Al₂O₃ to balance charges. A is incorrect because it does not balance the charges. C reverses the subscripts incorrectly. D is incorrect as it represents a different stoichiometry.
Question 2 · 1 mark · Difficulty 2/3

During a practical session in St. Lucia, students were required to name the compound NH₄NO₃, commonly used as a fertilizer. What is the correct name?

  1. Ammonia nitrate
  2. Ammonium nitrite
  3. Ammonium nitrate
  4. Nitrogen hydride nitrate
Show answer & explanation
✓ Answer: CAmmonium nitrate
Award 1 mark for correctly identifying NH₄⁺ as ammonium and NO₃⁻ as nitrate. A is incorrect because ammonia is NH₃, not NH₄⁺. B is incorrect because nitrite is NO₂⁻, not NO₃⁻. D uses non-standard nomenclature.
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20 questions · 25 min · free

CXC CSEC Chemistry: Chemical Formulae and Nomenclature FAQ

How many CXC CSEC Chemistry questions on Chemical Formulae and Nomenclature are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Chemical Formulae and Nomenclature for CXC CSEC Chemistry, 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 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 Chemical Formulae and Nomenclature practice with other Chemistry 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 Chemical Formulae and Nomenclature questions aligned to the official CXC CSEC Chemistry syllabus?
Every question is written against the published CXC CSEC 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 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 Chemical Formulae and Nomenclature typically tested on CXC CSEC Chemistry papers?
Chemical Formulae and Nomenclature appears across multiple question types on real CXC CSEC 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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