Acids, Bases And Salts: Identify And Test Substances

Practice acid-base basics

ScienceGrade 7Mixed10 questions15 min

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Inside this assignment

First 4 questions from the learning flow.

Explorer question style

Acidic, Basic or Neutral? · 5 questionsIndicator Clues · 5 questions

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Acidic, Basic or Neutral?

Use properties and examples to classify substances.

Choose the best answer for each question.

Question 1

EasyQuestion

Riya tests four kitchen substances. Which one is most likely acidic?

Topic: Acids and Bases · Skill: Identify acidic, basic and neutral substances

Question 2

EasyQuestion

A substance feels soapy and turns red litmus blue. What is its nature?

Topic: Acids and Bases · Skill: Identify acidic, basic and neutral substances

Question 3

EasyQuestion

Why are indicators useful in testing acids and bases?

Topic: Indicators · Skill: Explain how indicators detect acids and bases

Question 4

MediumQuestion

Blue litmus paper turns red when dipped in an unknown solution. What can be concluded?

Topic: Litmus Tests · Skill: Interpret colour changes of red and blue litmus

What this assignment covers

Classify common substances and interpret indicator and litmus observations.

Skills and sections

Identify acidic, basic and neutral substances, Explain how indicators detect acids and bases, Interpret colour changes of red and blue litmus, Explain neutralisation as acid-base reaction forming salt and water

Acidic, Basic or Neutral?: 5 questions
Indicator Clues: 5 questions