Greenhouse effect is due to:

Related Mcqs:

1. Greenhouse effect is:

   A. Caused by CO2 only
   B. Caused by CH4, SO2, NO2 gases
   C. Caused by those gases which absorb the infra-red light reflecting from earth
   D. Caused by combination of many gases

2. Greenhouse effect refers to:

   A. Production of cereals
   B. Trapping of UV rays
   C. Cooling of earth
   D. Warming of earth

3. Maximum greenhouse gas is released by which of the following country?

   A. USA/Korea
   B. Pakistan
   C. France
   D. England

4. Which important greenhouse gas other than methane is being produced from the agricultural fields?

   A. Arsine
   B. SO2
   C. NH3
   D. N2O

5. The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen by (appro.)

   A. 20 times
   B. 100 times
   C. 2 times
   D. 200 times

6. Green-house effect is due to the presence of:

   A. Ozone layer in the atmosphere
   B. Infra-red radiations
   C. Moisture in the atmosphere
   D. CO2 in the atmosphere

7. The air pollution caused by phosphate fertilizer factories is due to:The air pollution caused by phosphate fertilizer factories is due to:

   A. Phosphene
   B. SiF4
   C. Dust
   D. Halogens

8. Sometimes sound and uninjured seeds may fail to germinate due to reduced activity of the seed or seed parts resulting in blockade of the growth. This may be due to:

   A. External effects of environment
   B. Internal conditions within the plant itself, i.e. Embryo dormancy or seed coat dormancy
   C. Both (a) & (b)
   D. None of these

9. The unclassified area which constituted more than ____ of the total area at the time of independence, in due course of time, has dropped to the present level due to extension in the land use:

   A. 40%
   B. 50%
   C. 60%
   D. 70%

10. Green house effect refers to:

    A. Cooling of earth
    B. Trapping UV rays
    C. Production of cereals
    D. warming of earth