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Exploring Substances: Acidic, Basic, and Neutral

CBSE · Class 7 · Science

Practice quiz for Exploring Substances: Acidic, Basic, and Neutral — CBSE Class 7 Science. MCQs and questions with answers to test your preparation.

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Quick Quiz: Exploring Substances: Acidic, Basic, and Neutral

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1

What happens to blue litmus paper when it is dipped in lemon juice?

2

Litmus is obtained from which natural source?

3

What is the taste of acidic substances?

4

Red rose extract turns green in which type of solution?

44 Questions·
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Sample Questions

1multiple correct

Which of the following substances are basic in nature?

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Soap solution, Lime water, Baking soda solution

Soap solution, lime water, and baking soda solution are all basic substances. They turn red litmus paper to blue and feel slippery to touch. Vinegar and lemon juice are acidic.

2multiple correct

Which of the following are natural indicators?

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Turmeric, Red rose petals, Litmus, Purple cabbage

Turmeric, red rose petals, litmus, and purple cabbage are all natural indicators that can show different colors in acidic and basic solutions. Plastic strips are not natural indicators.

3multiple choice

What happens when an acid is mixed with a base?

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Neutralization occurs

When an acid is mixed with a base in proper amounts, neutralization occurs. This reaction produces salt and water, along with evolution of heat.

4multiple choice

Turmeric paper turns red in which type of solution?

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Basic solution only

Turmeric paper turns red only in basic solutions. It remains yellow in both acidic and neutral solutions, so it cannot distinguish between acids and neutral substances.

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Frequently Asked Questions

What are the important topics in Exploring Substances: Acidic, Basic, and Neutral for CBSE Class 7 Science?
Exploring Substances: Acidic, Basic, and Neutral covers several key topics that are frequently asked in CBSE Class 7 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Exploring Substances: Acidic, Basic, and Neutral — CBSE Class 7 Science?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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