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ماحولیاتی کیمیا: فضا

Written by Dr. Ayesha Nadeem (Chemistry)

دسویں جماعت · کیمیا · 9 سوالات

نام: ____________________   تاریخ: ____________

  1. The most abundant gas in the atmosphere is:

    • A Oxygen
    • B Nitrogen
    • C Argon
    • D Carbon dioxide

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

    • A Oxygen
    • B Helium
    • C Carbon dioxide
    • D Nitrogen

  3. Acid rain is caused mainly by oxides of:

    • A Hydrogen
    • B Noble gases
    • C Sulphur and nitrogen
    • D Carbon only

  4. The ozone layer protects us from:

    • A Ultraviolet radiation
    • B Infrared radiation
    • C Sound
    • D Radio waves

  5. CFCs are harmful because they:

    • A Cool the Earth
    • B Make rain acidic
    • C Increase oxygen
    • D Deplete the ozone layer

  6. The percentage of oxygen in the air is about:

    • A 21 percent
    • B 78 percent
    • C 50 percent
    • D 0.04 percent

  7. The gas that makes up about 0.04 percent of air is:

    • A Argon
    • B Oxygen
    • C Carbon dioxide
    • D Nitrogen

  8. Smog is a mixture of smoke and:

    • A Wind
    • B Rain
    • C Fog
    • D Snow

  9. Burning fossil fuels increases the level of:

    • A Nitrogen
    • B Carbon dioxide
    • C Oxygen
    • D Helium

جوابی کلید

1. B, 2. C, 3. C, 4. A, 5. D, 6. A, 7. C, 8. C, 9. B

  1. Nitrogen makes up about 78 percent of air.

  2. Carbon dioxide traps heat in the atmosphere.

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

  4. Ozone absorbs harmful ultraviolet radiation from the Sun.

  5. CFCs release chlorine that breaks down ozone.

  6. Air is about 21 percent oxygen.

  7. CO2 is about 0.04 percent.

  8. The word smog comes from smoke and fog.

  9. CO2 is released when they burn.