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Important Questions

Air and Atmosphere

ICSE · Class 7 · Chemistry

Most important questions from Air and Atmosphere for ICSE Class 7 Chemistry board exam 2026. MCQs, short answer, and long answer questions with marks.

42 questions48 flashcards5 concepts

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42 Questions·
multiple choicemultiple correct

Sample Questions

1multiple choice
1 marks

What is the percentage of carbon dioxide in air?

Show answer

0.03% to 0.04%

Carbon dioxide is present in air in a very small amount, about 0.03% to 0.04% by volume.

2multiple choice
1 marks

Which scientist proved in 1774 that air is a mixture of gases?

Show answer

Antoine Lavoisier

Antoine Lavoisier proved in 1774 that air is a mixture of gases.

3multiple choice
1 marks

Which gas was first discovered by Joseph Priestley in 1774?

Show answer

Oxygen

Joseph Priestley discovered oxygen in 1774 by heating mercury(II) oxide.

4multiple choice
1 marks

Which gas is essential for respiration?

Show answer

Oxygen

Living beings use oxygen in respiration to release energy from food.

+38 more questions available

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Frequently Asked Questions

What are the important topics in Air and Atmosphere for ICSE Class 7 Chemistry?
Air and Atmosphere covers several key topics that are frequently asked in ICSE 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 Air and Atmosphere — ICSE Class 7 Chemistry?
Understand the core concepts first, then work through the 42 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Air and Atmosphere?
There are 42 practice questions available for Air and Atmosphere. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

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

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