A hydrocarbon having the following number of carbon atoms doesn’t exist freely in the atmosphere:

Related Mcqs:

1. The lower most layer of atmosphere in which man and other living organisms exist is called:

   A. Thermosphere
   B. Mesosphere
   C. Stratospheres
   D. Troposphere

2. A need for agroforestry system will exist whenever the situations occur:

   A. Tree might lessen the risk of hardship because of crop failure and whenever trees will allow farmers to accumulate capital or cash
   B. Trees will help to spread production activities throughout the year, by staggering the harvests, providing products in dry seasons, or spreading the labour load
   C. Both (a) & (b)
   D. None of these

3. Ozone layer of upper atmosphere is being destroyed by:

   A. Sulphur di-oxide
   B. Carbon di-oxide
   C. Chloro-fluoro-carbon
   D. Smog

4. The major contributor to green house gases to the atmosphere is:

   A. Russia
   B. USA
   C. Brazil
   D. Germany

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

   A. same as present
   B. Less than the present
   C. Higher than the present
   D. Dependent on the amount of O2 in the atmosphere

6. The concentration of SO2 in the atmosphere is around:

   A. 0.01 ppm
   B. 0.001 ppm
   C. 0.5 ppm
   D. 0.75 ppm

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

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

8. The presence of O3 in atmosphere of earth:

   A. Has been responsible for increasing the average global temperature in recent
   B. Is advantageous since it supplies O2 for people travelling in jets
   C. Hinders higher rate of photosynthesis
   D. Helps in checking the penetration of ultra violet rays to earth

9. What are the chief pollutants of the atmosphere which are most likely to deplete the ozone layer?

   A. Sulphur di-oxide
   B. Carbon di-oxide
   C. Nitrogen oxides and fluoro-carbons
   D. Carbon monoxide

10. The percentage of run off water reaching the ocean and evaporation into atmosphere is respectively:

    A. 27 & 73
    B. 73 & 27
    C. 37 & 63
    D. 63 & 37