Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in___________________?

Related Mcqs:

1. Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of_________________?

   A. Ozone and iodine
   B. Chlorine or its compounds
   C. Ultraviolet light for irradiation of water
   D. All A., B. & C.

2. The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant ?

   A. Chlorine
   B. Alkalis
   C. Benzene hexachloride
   D. Alkyl benzene sulphonate (ABS)

3. Disinfection of water is done to remove ______________________?

   A. Color
   B. Bad taste
   C. Foul odour
   D. Bacteria

4. Removal of ______________ results from the disinfection of water?

   A. Turbidity
   B. Odour
   C. Hardness
   D. Bacteria

5. A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?

   A. Hydrogen
   B. Carbon dioxide
   C. Ozone
   D. None of these

6. A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?

   A. Global warming
   B. Green house
   C. Atmospheric effect
   D. Ionosphere

7. The most commonly used chemical coagulant in water treatment is________________?

   A. Ferrous sulphate
   B. Alum
   C. Lime
   D. Hydrazine

8. The resistance of water to the passage of light through it is a measure of the___________________?

   A. Turbidity
   B. Color
   C. Hardness
   D. Dissolved gases

9. Third law of thermodynamics is helpful in___________________?

   A. Prediction of the extent of a chemical reaction
   B. Calculating absolute entropies of substances at different temperature
   C. Evaluating entropy changes of chemical reaction
   D. Both B. and C.

10. Van Laar equation deals with the activity co-efficients in___________________?

    A. Binary solutions
    B. Ternary solutions
    C. Azeotropic mixture only
    D. None of these