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

Related Mcqs:

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

   A. Forestation
   B. Rain
   C. Green house effect
   D. Vegetation

2. CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing ________________ molecules of ozone?

   A. 102
   B. 105
   C. 109
   D. 1015

3. 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

4. ‘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

5. 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

6. 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

7. Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?

   A. 3
   B. 30
   C. 7
   D. 70

8. Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) ?

   A. Acts as a green house gas thereby raising earth’s temperature
   B. Causes asphyxia
   C. Causes increase in sea level
   D. Enhances the green house effect

9. 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.

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

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