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CIE · IGCSE · Co-ordinated Science (Double Award)

Acids, bases and salts
Practice Questions

20 CIE IGCSE Co-ordinated Science (Double Award) questions on Acids, bases and salts, 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 Acids, bases and salts.

Try 2 sample questions on Acids, bases and salts

Question 1 · 1 mark · Difficulty 1/3

Which of the following is the correct definition of an acid according to its behaviour in aqueous solution?

  1. A substance that produces hydroxide ions when dissolved in water
  2. A substance that produces hydrogen ions when dissolved in water
  3. A substance with a pH value greater than 7
  4. A substance that neutralises bases to form water only
Show answer & explanation
✓ Answer: B — A substance that produces hydrogen ions when dissolved in water
An acid is defined as a substance that produces hydrogen ions (H⁺) when dissolved in water. Option A describes a base/alkali. Option C is incomplete as neutralisation also produces a salt. Option D describes an alkali, not an acid.
Question 2 · 1 mark · Difficulty 2/3

A student adds excess zinc carbonate to dilute sulfuric acid and filters the mixture. What is the purpose of using excess zinc carbonate in this preparation?

  1. To increase the concentration of the salt formed
  2. To ensure all the acid is completely used up
  3. To increase the rate of the reaction with the acid
  4. To prevent the salt from crystallising too quickly
Show answer & explanation
✓ Answer: B — To ensure all the acid is completely used up
Excess carbonate ensures all the sulfuric acid is neutralised so that no acid remains in the filtrate, giving a pure salt solution. Option A is incorrect because excess reagent does not significantly affect rate once concentration is limiting. Option C is incorrect as excess solid is removed by filtration. Option D has no chemical basis.
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20 questions · 25 min · free

CIE IGCSE Co-ordinated Science (Double Award): Acids, bases and salts FAQ

How many CIE IGCSE Co-ordinated Science (Double Award) questions on Acids, bases and salts are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Acids, bases and salts for CIE IGCSE Co-ordinated Science (Double Award), 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 CIE 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 CIE IGCSE students preparing for Co-ordinated Science (Double Award)?
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 Acids, bases and salts practice with other Co-ordinated Science (Double Award) 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 Acids, bases and salts questions aligned to the official CIE IGCSE Co-ordinated Science (Double Award) syllabus?
Every question is written against the published CIE IGCSE Co-ordinated Science (Double Award) 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 Acids, bases and salts typically tested on CIE IGCSE Co-ordinated Science (Double Award) papers?
Acids, bases and salts appears across multiple question types on real CIE IGCSE Co-ordinated Science (Double Award) 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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