Class 11 Chemistry · Chapter 14 · Test 1
Atmosphere Chapter 14
This 44-question MCQ test checks your understanding of the layers of the atmosphere and their temperature trends.
44 questions · 30 min · 44 marks
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Sample questions
The first 5 of 44. Try each one, then tap to see the answer.
Question 1
Which gas causes yellow color in photochemical smog?
- ACO
- BSO3
- CNO2
- DSO2
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Answer: C
NO2 is a reddish-brown gas and is the key oxidant of photochemical smog which gives it the brownish-yellow colour.
Question 2
The depletion of ozone in stratosphere region is mainly due to the reaction of O3 with:
- ACO2
- BSO2
- CO2
- DCFCs
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Answer: D
CFCs break down in the stratosphere under UV to give chlorine free radicals which destroy ozone.
Question 3
Which particulate matter size is considered the most harmful to human health?
- APM 10.0
- BPM 5.0
- CPM 2.5
- DPM 1.0
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Answer: C
The text gives PM 2.5 as the finer particles which penetrate airways and are the commonly monitored harmful size (the text lists the PM size range as 2.5 to 10 micrometres).
Question 4
Which of the following is a natural factor that can improve air quality?
- AWildfire
- BUrbanization
- CRainfall
- DIndustrial emission
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Answer: C
Wildfires and industrial emission lower air quality while rainfall washes pollutants out of the air.
Question 5
What is a common human activity that led to increased level of carbon monoxide in the atmosphere?
- ATree planting
- BGasoline driven vehicles
- CUsing electric appliances
- DSolar panel installation
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Answer: B
CO is produced mainly by incomplete combustion of fossil fuels such as in vehicle engines.
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