Color test of water is done with an instrument called__________________?

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. A standard test for determination of hardness in water is termed as ______________ test?

   A. EDTA
   B. Electometric
   C. Total count
   D. Presumptive

3. Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?

   A. Carbonates
   B. Bi-carbonates
   C. Iron & manganese
   D. Arsenic

4. The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible _____________ process?

   A. Isobaric
   B. Isothermal
   C. Adiabatic
   D. None of these

5. 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)

6. For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be__________________?

   A. 6738.9
   B. 6753.5
   C. 7058.3
   D. 9000

7. Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?

   A. PvB
   B. xB.PvB
   C. (Patm – Pvw)xB
   D. xB.Patm

8. Fresh domestic sewage is _______________ in color?

   A. Grey
   B. Dark brown
   C. Red
   D. Black

9. Disinfection of water is done to remove ______________________?

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

10. Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in____________________?

    A. Coagulation and flocculation of colloids
    B. Oxidation of carbonaceous matter to CO2
    C. Nitrification or oxidation of ammonia derived from breakdown of nitrogenous organic matter
    to the nitrite and eventually to the nitrate
    D. All A., B. and C.