Everyday Science

Air Pollution & Its Effects MCQs With Answer

What is the primary cause of air pollution?
A) Natural disasters
B) Industrial emissions
C) Increased oxygen levels
D) Photosynthesis

Answer
B) Industrial emissions

Which gas is the main contributor to acid rain?
A) Carbon dioxide
B) Sulfur dioxide
C) Nitrogen gas
D) Hydrogen gas

Answer
B) Sulfur dioxide

Which of the following is a primary pollutant?
A) Ozone
B) Sulfur dioxide
C) Smog
D) Acid rain

Answer
B) Sulfur dioxide

Which air pollutant is responsible for global warming?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Helium

Answer
B) Carbon dioxide

What is smog?
A) A type of weather phenomenon
B) A combination of fog and pollutants
C) A natural gas
D) A clean air component

Answer
B) A combination of fog and pollutants

Which industry is the largest contributor to air pollution?
A) Textile
B) Agriculture
C) Transportation
D) Fisheries

Answer
C) Transportation

What is the main source of indoor air pollution?
A) Burning fossil fuels
B) Planting trees indoors
C) Drinking bottled water
D) Increased humidity

Answer
A) Burning fossil fuels

Which of the following is a greenhouse gas?
A) Oxygen
B) Methane
C) Nitrogen
D) Argon

Answer
B) Methane

Which pollutant is most harmful to the ozone layer?
A) Carbon monoxide
B) Chlorofluorocarbons (CFCs)
C) Nitrogen dioxide
D) Hydrogen sulfide

Answer
B) Chlorofluorocarbons (CFCs)

Which organ is most affected by air pollution?
A) Heart
B) Lungs
C) Liver
D) Kidneys

Answer
B) Lungs

What is the major effect of carbon monoxide on human health?
A) Enhances breathing
B) Reduces oxygen transport in blood
C) Increases metabolism
D) Strengthens immunity

Answer
B) Reduces oxygen transport in blood

Which of the following is NOT a consequence of air pollution?
A) Respiratory diseases
B) Improved air quality
C) Climate change
D) Acid rain

Answer
B) Improved air quality

Which gas is released in large amounts from vehicles and contributes to air pollution?
A) Nitrogen gas
B) Oxygen
C) Carbon monoxide
D) Helium

Answer
C) Carbon monoxide

Which environmental problem is directly linked to excessive carbon dioxide emissions?
A) Ozone depletion
B) Global warming
C) Oil spills
D) Noise pollution

Answer
B) Global warming

Which pollutant is the main cause of respiratory issues in urban areas?
A) Ozone
B) Particulate matter (PM2.5)
C) Sulfur
D) Helium

Answer
B) Particulate matter (PM2.5)

Which of the following is a natural source of air pollution?
A) Volcanic eruptions
B) Car emissions
C) Factory smoke
D) Burning fossil fuels

Answer
A) Volcanic eruptions

What is the primary effect of acid rain?
A) Improves soil fertility
B) Lowers water pH levels
C) Enhances plant growth
D) Reduces global warming

Answer
B) Lowers water pH levels

Which organization monitors global air pollution levels?
A) FIFA
B) World Health Organization (WHO)
C) International Monetary Fund (IMF)
D) NASA

Answer
B) World Health Organization (WHO)

What is the best way to reduce air pollution?
A) Increase fossil fuel consumption
B) Reduce emissions from industries and vehicles
C) Cut down more trees
D) Use more plastic

Answer
B) Reduce emissions from industries and vehicles

Which type of pollution affects visibility and causes haze?
A) Water pollution
B) Noise pollution
C) Air pollution
D) Light pollution

Answer
C) Air pollution

Which pollutant is commonly associated with respiratory diseases like asthma?
A) Carbon monoxide
B) Ozone
C) Nitrogen
D) Oxygen

Answer
A) Carbon monoxide

How does deforestation contribute to air pollution?
A) Increases oxygen levels
B) Reduces carbon dioxide absorption
C) Improves air quality
D) Decreases global temperature

Answer
B) Reduces carbon dioxide absorption

Which chemical contributes most to photochemical smog?
A) Nitrogen oxides
B) Chlorine
C) Sodium
D) Calcium

Answer
A) Nitrogen oxides

Which action can help reduce indoor air pollution?
A) Smoking indoors
B) Using air purifiers
C) Burning coal inside homes
D) Keeping windows closed at all times

Answer
B) Using air purifiers

Which pollutant is formed by incomplete combustion of fuels?
A) Carbon dioxide
B) Oxygen
C) Carbon monoxide
D) Ozone

Answer
C) Carbon monoxide

How does air pollution affect climate?
A) Increases greenhouse gas levels
B) Reduces global warming
C) Increases oxygen concentration
D) Stabilizes temperatures

Answer
A) Increases greenhouse gas levels

Which device is used to measure air pollution?
A) Barometer
B) Thermometer
C) Air quality monitor
D) Speedometer

Answer
C) Air quality monitor

What is the main cause of ozone layer depletion?
A) Overuse of water
B) Emission of CFCs
C) Increased carbon dioxide levels
D) Excessive oxygen production

Answer
B) Emission of CFCs

Which gas is most responsible for acid rain formation?
A) Oxygen
B) Sulfur dioxide
C) Helium
D) Methane

Answer
B) Sulfur dioxide

Which type of energy production contributes the least to air pollution?
A) Coal-fired power plants
B) Wind energy
C) Oil refining
D) Diesel generators

Answer
B) Wind energy

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