اردو

Home / Practice / Class 10 / Chemistry / Environmental chemistry: the atmosphere

Environmental chemistry: the atmosphere

5 Class 10 Chemistry questions with answers and explanations.

Printable worksheet with answer key

All questions with answers

  1. The most abundant gas in the atmosphere is:

    • 1 Oxygen
    • 2 Nitrogen
    • 3 Argon
    • 4 Carbon dioxide
    Show answer

    Correct answer: Nitrogen

    Nitrogen makes up about 78 percent of air.

    Report a mistake

  2. The gas mainly responsible for the greenhouse effect from burning fuels is:

    • 1 Oxygen
    • 2 Helium
    • 3 Carbon dioxide
    • 4 Nitrogen
    Show answer

    Correct answer: Carbon dioxide

    Carbon dioxide traps heat in the atmosphere.

    Report a mistake

  3. Acid rain is caused mainly by oxides of:

    • 1 Hydrogen
    • 2 Noble gases
    • 3 Sulphur and nitrogen
    • 4 Carbon only
    Show answer

    Correct answer: Sulphur and nitrogen

    Sulphur dioxide and nitrogen oxides dissolve in rain to form acids.

    Report a mistake

  4. The ozone layer protects us from:

    • 1 Ultraviolet radiation
    • 2 Infrared radiation
    • 3 Sound
    • 4 Radio waves
    Show answer

    Correct answer: Ultraviolet radiation

    Ozone absorbs harmful ultraviolet radiation from the Sun.

    Report a mistake

  5. CFCs are harmful because they:

    • 1 Cool the Earth
    • 2 Make rain acidic
    • 3 Increase oxygen
    • 4 Deplete the ozone layer
    Show answer

    Correct answer: Deplete the ozone layer

    CFCs release chlorine that breaks down ozone.

    Report a mistake

More Chemistry topics
Chemical equilibrium
Acids, bases and salts
Organic chemistry
Hydrocarbons
Biochemistry
Environmental chemistry: water
Chemical industries