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HomeCIE IGCSE ChemistryAcids, bases and the pH scale
CIE · IGCSE · Chemistry

Acids, bases and the pH scale
Practice Questions

20 CIE IGCSE Chemistry questions on Acids, bases and the pH scale, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Acids, bases and the pH scale

Question 1 · 1 mark · Difficulty 1/3

What is the pH of a neutral solution at 25°C?

  1. 0
  2. 1
  3. 7
  4. 14
Show answer & explanation
✓ Answer: C7
Award 1 mark for identifying pH 7 as neutral. A is incorrect — pH 0 is strongly acidic. B is incorrect — pH 1 is strongly acidic. D is incorrect — pH 14 is strongly alkaline.
Question 2 · 1 mark · Difficulty 1/3

Which ion is always produced when an acid dissolves in water?

  1. Cl⁻
  2. H⁺
  3. OH⁻
  4. SO₄²⁻
Show answer & explanation
✓ Answer: BH⁺
Award 1 mark for identifying hydrogen ions as the defining characteristic of acids in aqueous solution. A is incorrect — Cl⁻ is only produced by hydrochloric acid. C is incorrect — OH⁻ ions are produced by bases/alkalis. D is incorrect — SO₄²⁻ is only produced by sulfuric acid.
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20 questions · 25 min · free

CIE IGCSE Chemistry: Acids, bases and the pH scale FAQ

How many CIE IGCSE Chemistry questions on Acids, bases and the pH scale are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Acids, bases and the pH scale for CIE IGCSE 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 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 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 Acids, bases and the pH scale 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 Acids, bases and the pH scale 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 Acids, bases and the pH scale typically tested on CIE IGCSE Chemistry papers?
Acids, bases and the pH scale 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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