brodidit for students
Environmental chemistry: the atmosphere
Class 10 · Chemistry · 9 questions
Name: ____________________ Date: ____________
The most abundant gas in the atmosphere is:
- A Oxygen
- B Nitrogen
- C Argon
- D Carbon dioxide
The gas mainly responsible for the greenhouse effect from burning fuels is:
- A Oxygen
- B Helium
- C Carbon dioxide
- D Nitrogen
Acid rain is caused mainly by oxides of:
- A Hydrogen
- B Noble gases
- C Sulphur and nitrogen
- D Carbon only
The ozone layer protects us from:
- A Ultraviolet radiation
- B Infrared radiation
- C Sound
- D Radio waves
CFCs are harmful because they:
- A Cool the Earth
- B Make rain acidic
- C Increase oxygen
- D Deplete the ozone layer
The percentage of oxygen in the air is about:
- A 21 percent
- B 78 percent
- C 50 percent
- D 0.04 percent
The gas that makes up about 0.04 percent of air is:
- A Argon
- B Oxygen
- C Carbon dioxide
- D Nitrogen
Smog is a mixture of smoke and:
- A Wind
- B Rain
- C Fog
- D Snow
Burning fossil fuels increases the level of:
- A Nitrogen
- B Carbon dioxide
- C Oxygen
- D Helium
Answer key
1. B, 2. C, 3. C, 4. A, 5. D, 6. A, 7. C, 8. C, 9. B
Nitrogen makes up about 78 percent of air.
Carbon dioxide traps heat in the atmosphere.
Sulphur dioxide and nitrogen oxides dissolve in rain to form acids.
Ozone absorbs harmful ultraviolet radiation from the Sun.
CFCs release chlorine that breaks down ozone.
Air is about 21 percent oxygen.
CO2 is about 0.04 percent.
The word smog comes from smoke and fog.
CO2 is released when they burn.