Class 9 Chemistry · Chapter 10 · Test 5

Reducing Environmental Issues

24 MCQs covering strategies to reduce climate change air pollution and acid rain including planting trees catalytic converters low sulphur fuels flue gas desulphurization renewable energy and measures for improving air quality.

MCQs

24 questions · 20 min · 24 marks

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Sample questions

The first 5 of 24. Try each one, then tap to see the answer.

Question 1
Which activity is considered helpful in removing air pollution
- APlanting trees
- BBurning more fossil fuels
- CIncreasing vehicle emissions
- DIncreasing deforestation
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Answer: A
Planting trees is helpful because plants absorb carbon dioxide during photosynthesis.
Question 2
Which process carried out by plants helps clean the air
- APhotosynthesis
- BCombustion
- CDistillation
- DEvaporation
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Answer: A
Photosynthesis absorbs carbon dioxide and releases oxygen.
Question 3
Which substance is absorbed by plants during photosynthesis
- ACarbon dioxide
- BOxygen
- CNitrogen
- DSulphur dioxide
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Answer: A
Plants absorb carbon dioxide during photosynthesis.
Question 4
Which gas is released by plants during photosynthesis
- AOxygen
- BCarbon dioxide
- CCarbon monoxide
- DMethane
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Answer: A
Plants release oxygen during photosynthesis.
Question 5
Where are catalytic converters used
- AExhaust systems of automobiles
- BWater treatment plants
- CRefrigerators
- DElectric fans
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Answer: A
Catalytic converters are used in the exhaust systems of modern automobiles.

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