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Science•JHS Acids, Bases & Ecosystems

Acids, bases and indicators

Junior High 6 questions
AI-drafted from platform data — specialist review scheduledBy DigiTransact Mastermind editorial teamLast updated
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What acids, bases and indicators means

You learn how to tell acids from bases using simple tests and indicator colours. This helps you make sense of everyday substances like soaps, juices and cleaning agents.

What you will practise

  • Identify whether a substance is acidic or basic from test results.
  • Use litmus colour changes to classify common solutions.
  • Read simple pH values and spot a neutral substance.
  • Choose the correct indicator change from a short question.

Before you start

You should already know that substances can be mixed with water to form solutions. It also helps if you can read simple colour changes and small number scales.

Worked example

One question from this skill's own question bank, shown with its full working.

Question

Litmus paper turns which colour in an acid?

  • blue
  • red
  • green
  • yellow
Answer: red

Working: Acids turn blue litmus red.

Common mistakes to avoid

  • Mixing up litmus results. Remember, acids turn blue litmus red.
  • Thinking every clear liquid is neutral. Check the test result, not the appearance.
  • Forgetting that soap solution is basic. Learn common examples of bases.
  • Treating pH 7 as acidic. Neutral substances are about pH 7.

Curriculum and exam alignment

Ghana GES Basic 7 to 9 syllabusBECE

This topic normally appears in Junior High School science as part of work on substances, simple chemical properties and everyday applications. It supports BECE preparation by building confidence with indicator questions and basic classification tasks.

Curriculum notes are a general guide to where this work normally sits. Always check the syllabus your school or examination body is currently using.

Related skills

Other JHS Acids, Bases & Ecosystems skills in Science, at the same point in the course.

Other Science topics

My WorldLiving Things Around UsSHS SciencesUniversity ScienceBiologyChemistry

Related study guides

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Exams that assess acids, bases and indicators

Junior High work on this skill feeds directly into these exam papers. Each page lists the Science topics that appear on it.

BECEBECE practice questionsFree BECE practice across the subjects at this stage, with worked answers.GESGES practice questionsFree GES practice across the subjects at this stage, with worked answers.

How this page was produced

This text was drafted with AI assistance from the questions and topics already stored on the platform. A subject-specialist review is scheduled but has not yet been recorded, so we do not claim it here.

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Practise acids, bases and indicators

6 questions with a worked answer after every attempt, and a SmartScore that tracks how close you are to mastery.

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