Pick out the one which is not a chemical coagulant ?

Related Mcqs:

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

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

2. 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

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. 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

5. 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

6. 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

7. The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about ____________ decibels?

   A. 60
   B. 90
   C. 105
   D. 120

8. Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of _____________ metres?

   A. 100
   B. 1000
   C. 400
   D. 4000

9. Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about ______________ decibels?

   A. 20
   B. 60
   C. 90
   D. 120

10. If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will___________________?

    A. Increase
    B. Decrease
    C. Remain unaltered
    D. Increase or decrease; depends on the particular reaction