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HomeCXC CSEC ChemistryEnergy Changes in Chemical Reactions: Exothermic and Endothermic
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Energy Changes in Chemical Reactions: Exothermic and Endothermic
Practice Questions

20 CXC CSEC Chemistry questions on Energy Changes in Chemical Reactions: Exothermic and Endothermic, each with instant feedback and a full examiner-style mark scheme.

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Question 1 · 1 mark · Difficulty 1/3

A student in Trinidad added dilute hydrochloric acid to sodium hydroxide solution in a beaker and noticed the beaker became warm to touch. Which term best describes this type of reaction?

  1. Endothermic reaction
  2. Exothermic reaction
  3. Displacement reaction
  4. Decomposition reaction
Show answer & explanation
✓ Answer: BExothermic reaction
Award 1 mark for identifying that heat is released to the surroundings, making the beaker warm. A is incorrect because endothermic reactions absorb heat, making surroundings cooler. C describes a type of reaction, not an energy change. D describes breaking down of compounds, not energy transfer.
Question 2 · 1 mark · Difficulty 2/3

A farmer in Guyana uses ammonium nitrate fertilizer. When this fertilizer dissolves in water, the solution becomes cold. Which row correctly identifies the type of process and direction of energy transfer?

  1. Exothermic; energy transferred from surroundings to solution
  2. Exothermic; energy transferred from solution to surroundings
  3. Endothermic; energy transferred from surroundings to solution
  4. Endothermic; energy transferred from solution to surroundings
Show answer & explanation
✓ Answer: CEndothermic; energy transferred from surroundings to solution
Award 1 mark for identifying that cooling indicates energy absorbed from surroundings. A and B are incorrect as exothermic processes release heat. D has correct process type but wrong direction of energy flow.
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CXC CSEC Chemistry: Energy Changes in Chemical Reactions: Exothermic and Endothermic FAQ

How many CXC CSEC Chemistry questions on Energy Changes in Chemical Reactions: Exothermic and Endothermic are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Energy Changes in Chemical Reactions: Exothermic and Endothermic 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 Energy Changes in Chemical Reactions: Exothermic and Endothermic 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 Energy Changes in Chemical Reactions: Exothermic and Endothermic 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 Energy Changes in Chemical Reactions: Exothermic and Endothermic typically tested on CXC CSEC Chemistry papers?
Energy Changes in Chemical Reactions: Exothermic and Endothermic 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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