Which one of the following makes the bulk of hydrospheres content ?

Related Mcqs:

1. When benzene is substituted by halogens only which one of the following halogens only which one of the following halogens is given the number one position in the ring while writing the name of compound ?

   A. Bromine
   B. Chlorine
   C. Fluorine
   D. Iodine

2. Which of the following is a macro nutrient ?

   A. boron
   B. iron
   C. copper
   D. carbon

3. Which of the following is not a condition for the formation of smog ?

   A. sufficient NO
   B. sunlight
   C. less movement of air
   D. winds

4. In which of the following layer of atmosphere there is more thickness of ozone layer ?

   A. troposphere
   B. stratosphere
   C. mesosphere
   D. photosphere

5. Which of the following air pollutants is more dangerous for ozone layer ?

   A. CFC
   B. CO2
   C. CO
   D. Oxides of nitrogen

6. Which of the following is not a heavy industry ?

   A. iron
   B. fertilizer
   C. paper
   D. none

7. Which of the following is not a secondary pollutant_________________?

   A. ozone
   B. carbonic acid
   C. sulphuric acid
   D. carbon dioxide

8. Which of the following gases is the main cause of acid rain ?

   A. CO
   B. NO2
   C. both a & b
   D. none of the above

9. Which of the following factors help to measure quallity of water ?

   A. DO
   B. BOD
   C. COD
   D. all of the above

10. Which of the following is used as water disinfectant to avoid the formation of toxic compounds_________________?

    A. Cl2
    B. O3
    C. ClO2
    D. both B & C