The most commonly used chemical coagulant in water treatment is________________?

Related Mcqs:

1. The amount of chemical coagulant added for treatment of polluted water ______________ with increase in temperature of the polluted water to be treated?

   A. Decreases
   B. Increases
   C. Remain constant
   D. May increase or decrease; depends on the chemical characteristics of polluted water

2. Which is the most widely used coagulant for the treatment of turbid water ?

   A. Alum (aluminium sulphate)
   B. Lime
   C. Ferric chloride
   D. Sodium aluminate

3. Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is________________?

   A. 0
   B. 1
   C. ∞
   D. None of these

4. Pick out the one which is not a chemical coagulant ?

   A. Aluminium sulphate
   B. Ferrous sulphate
   C. Hydrated lime
   D. Chloramine

5. At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) ?

   A. μ° + RT ln f
   B. μ°+ R ln f
   C. μ° + T ln f
   D. μ° + R/T ln f

6. During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?

   A. Filtration
   B. Digestion
   C. Sedimentation
   D. Both B. and C.

7. In sewage treatment, its sedimentation is speeded up by commonly adding__________________?

   A. Hydrochloric acid
   B. Lime
   C. Copper sulphate
   D. Sodium sulphate

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

   A. Food industry
   B. Municipal sewage treatment
   C. Petroleum refinery
   D. Iron & steel plant

9. In water treatment plant, zeolite process is used to remove the _____________ of water?

   A. Acidity
   B. Alkalinity
   C. Hardness
   D. Iron & zinc

10. Chemical engineering thermodynamics is concerned with the ____________ in/of chemical processes?

    A. Reaction mechanism
    B. Calculation of rates
    C. Energy transformation from one form to another
    D. None of these