Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?

Related Mcqs:

1. The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?

   A. Ionosphere
   B. Troposphere
   C. Stratosphere
   D. None of these

2. Higher concentration of nitrogen dioxide in atmospheric air causes___________________?

   A. Cancer
   B. Bronchitis
   C. Asphyxiation
   D. Corrosion

3. Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?

   A. Fading of dyes on textiles
   B. Corrosion, tarnishing & soiling of metals
   C. Reduced strength of textiles
   D. All A., B. and C.

4. From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about ________________ ppm?

   A. 5
   B. 50
   C. 500
   D. 5000

5. The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?

   A. Catalytic conversion
   B. Green house effect
   C. Global warming
   D. Both B. and C.

6. The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is _____________ kg mole?

   A. 1
   B. 0
   C. 16
   D. 44

7. Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?

   A. CO
   B. SO2
   C. NOx
   D. CFC (chloro fluoro carbons)

8. ‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the____________________?

   A. Industrial chimney exhaust
   B. Automobiles exhaust
   C. Photochemical reaction in polluted atmosphere
   D. Burning of domestic fuel

9. Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?

   A. CO2
   B. H2
   C. SO3
   D. N2

10. Sulphur dioxide present in the industrial chimney exhaust gases causes____________________?

    A. Respiratory & lung disease
    B. Reduction in plant’s productivity owing to acid rain
    C. Corrosion of building materials
    D. All A., B. and C.