What is environmental chemistry

The study of chemicals and pollutants in the environment

Class 9 Chemistry · Chapter 10 · Test 1

Atmosphere and Air Pollutants

25 MCQs covering the composition of the atmosphere the definition and types of air pollutants major sources of pollution concentration in ppm smog and the harmful effects of major air pollutants.

MCQs

25 questions · 20 min · 25 marks

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Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

Question 1
Which gas makes up the largest proportion of the atmosphere
- ANitrogen
- BOxygen
- CCarbon dioxide
- DNoble gases
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Answer: A
Nitrogen is the most abundant gas in the atmosphere.
Question 2
What percentage of the atmosphere is oxygen
- A21%
- B78%
- C0.04%
- D50%
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Answer: A
Oxygen makes up about 21% of the atmosphere.
Question 3
What percentage of the atmosphere is nitrogen
- A78%
- B21%
- C0.04%
- D10%
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Answer: A
Nitrogen makes up about 78% of the atmosphere.
Question 4
Which gas is present in the atmosphere at about 0.04%
- ACarbon dioxide
- BOxygen
- CNitrogen
- DHydrogen
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Answer: A
The source states that carbon dioxide is present in the atmosphere at about 0.04%.
Question 5
What is environmental chemistry
- AThe study of chemicals and pollutants in the environment
- BThe study of stars
- CThe study of rocks only
- DThe study of planets
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Answer: A
Environmental chemistry deals with chemicals and other pollutants in the environment.

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