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CXC · CSEC · Chemistry

pH Scale and Indicators
Practice Questions

20 CXC CSEC Chemistry questions on pH Scale and Indicators, 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 pH Scale and Indicators.

Try 2 sample questions on pH Scale and Indicators

Question 1 · 1 mark · Difficulty 1/3

A farmer in Jamaica tests the soil pH in his sugarcane field and obtains a reading of 5.5. Which statement correctly describes this soil?

  1. The soil is acidic because the pH is below 7
  2. The soil is alkaline because the pH is below 7
  3. The soil is neutral because the pH is close to 7
  4. The soil is acidic because the pH is above 7
Show answer & explanation
✓ Answer: AThe soil is acidic because the pH is below 7
Award 1 mark for identifying that pH below 7 indicates acidic conditions. B is incorrect — alkaline solutions have pH above 7, not below. C is incorrect — pH 5.5 is not close enough to 7 to be considered neutral. D is incorrect — it states pH is above 7, which contradicts the given value of 5.5.
Question 2 · 1 mark · Difficulty 1/3

Universal indicator is added to four different solutions found in a Trinidad laboratory. Which colour would indicate the most strongly alkaline solution?

  1. Red
  2. Orange
  3. Green
  4. Purple
Show answer & explanation
✓ Answer: DPurple
Award 1 mark for identifying purple as the colour for strongly alkaline solutions (pH 13-14). A is incorrect — red indicates strongly acidic (pH 1-2). B is incorrect — orange indicates weakly acidic (pH 3-4). C is incorrect — green indicates neutral (pH 7).
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20 questions · 25 min · free

CXC CSEC Chemistry: pH Scale and Indicators FAQ

How many CXC CSEC Chemistry questions on pH Scale and Indicators are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on pH Scale and Indicators 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 pH Scale and Indicators 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 pH Scale and Indicators 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 pH Scale and Indicators typically tested on CXC CSEC Chemistry papers?
pH Scale and Indicators 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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