Acids, Bases and Indicators
Science · Grade 7 · Week 5 · 25 questions
Acids, bases, and salts are fundamental categories of chemicals that interact in important ways. Understanding their properties and reactions is essential for chemistry and has practical applications in everyday life.
What you'll practise
- Identify acids, bases, and their properties
- Use indicators to test pH levels
- Understand neutralisation reactions
- Describe the formation and uses of salts
All 25 questions in this Acids, Bases and Indicators quiz
Grade 7 Science — Acids, Bases and Indicators: 25 practice questions with instant scoring and explanations.
- A substance that turns blue litmus paper red is
- A substance that turns red litmus paper blue is
- Which of the following is a natural indicator?
- When turmeric solution is added to a base, it turns
- The China rose indicator turns which colour in an acid?
- The China rose indicator turns which colour in a base?
- Neutralization is the reaction between
- What is the pH of a neutral substance?
- Substances with pH less than 7 are
- Substances with pH greater than 7 are
- Lemon juice is an example of
- Soap solution is an example of
- The process of mixing an acid with a base to produce a salt and water is called
- Which indicator is extracted from onion skin and leaves?
- When an acid and base neutralize each other, they form
- Vinegar has a pH of approximately
- Baking soda solution has a pH that is
- Which of the following is used to preserve pickles?
- The pH scale ranges from
- An indicator is a substance that
- When lime water is mixed with carbon dioxide, it becomes
- The main use of an acid in industry is
- Which substance is used to reduce the acidity of soil?
- Bees sting causes pain because bee venom is
- Wasp sting causes pain because wasp venom is
Question 1 of 250 correct so far