Environmental Science - Part 3 - TNPSC Portal

1. The medium affected by Fenitrothion are? Answer

   Water and air

2. The solar radiation which reaches earth , what is the percentage of visible rays ? Answer

   45.00%

3. What is the highest power producer of India ? Answer

   Thermal Power Production

4. Harmful health effect caused by Mirex ? Answer

   Bioaccumulates in food chain, toxic

5. The medium affected by Mirex are? Answer

   Water, food chain

6. Nuclear fission reactors uses _________? Answer

   Urenium-235

7. Harmful health effect caused by PCB ? Answer

   Liver and heart damage

8. The medium affected by PCB are? Answer

   Food chain

9. Harmful health effect caused by Trihalomethanes? Answer

   Carcinogenic

10. The solar radiation which reaches earth , what is the percentage of infrared rays ? Answer

    45.00%

11. The medium affected by Trihalomethanes is? Answer

    Water

12. High temperature gas-cooled reactors and fast-breeder reactors uses ? Answer

    Pu 238 and Th232 are converted to fissionable Pu 239 and U 233

13. One calorie is equalent to how many Joules ? Answer

    4.184 J

14. The solar radiation which reaches earth , what is the percentage of ultraviolet rays ? Answer

    10.00%

15. How much of atmoshpheric radiant energy is used for photosynthesis ? Answer

    0.02%

16. What colours of wavelength are used by utotrophs for photosynthesis ? Answer

    Blue and red wavelenghts of light

17. How much percentage , the fresh water covers among the total water available in earth ? Answer

    2.70%

18. What is the use of Phosphates in human beings ? Answer

    Growth and maintenace of animal and human bones and teeth

19. What is the use of organo-phospates ? Answer

    Useful in cell division involving production of nuclear deoxyribonucleic acid (DNA) and ribonucleic acid (RNA)

20. What is the use of Sulphur in animals and humanbeings ? Answer

    Synthesis of amino acids and proteins.