If there were no CO2 in the earth’s atmosphere, the temperature of earth’s surface would have been:

Related Mcqs:

1. The average amount of CO2 in atmosphere is:

   A. 0.30%
   B. 0.00%
   C. 3.00%
   D. 0.03%

2. The lowest temperature in the atmosphere is recorded at:

   A. Mesopause
   B. Tropopause
   C. Stratopause
   D. All of these

3. It is thought that the concentration of CO2 by the year 2040 shall reach:

   A. 400 ppm
   B. 500 ppm
   C. 475 ppm
   D. 450 ppm

4. It is thought that the concentration of CO2 in the year 1890 was around:

   A. 245 ppm
   B. 275 ppm
   C. 215 ppm
   D. 230 ppm

5. Checking of re-radiating heat by atmospheric dust water vapour, ozone, CO2 is known as:

   A. Green house effect
   B. Radioactive effect
   C. Ozone layer effect
   D. Solar effect

6. In which one of the following habitats does the diurnal temperature of soil surface vary most:

   A. Forest
   B. Desert
   C. Grassland
   D. Shrub land

7. The temperature of surface water of oceans is about 25C and it is 5?C at the depth of few hundred meters in the:

   A. Temperate region
   B. Tropical region
   C. Torrid region
   D. Equatorial region

8. The maximum amount of CO2 fixed by green plants by way of photosynthesis in a year is:

   A. 9 x 1013 kg
   B. 8 x 1012 kg
   C. 9 x 1011 kg
   D. 8 x 1010 kg

9. In submerged hydrophytes entry of CO2 is through:

   A. Epidermis as dissolved CO2
   B. Epidermis as carbonates only
   C. Epidermis as carbonates only
   D. Both (b) and (c)

10. The particulate matter dispersed in the atmosphere is:

    A. Gaseous
    B. Mainly gaseous
    C. Non-gaseous
    D. Mainly non-gaseous