The biochemical treatment applied to sewage effluents is a process of__________________?

Related Mcqs:

1. Good quality of edible salt is obtained from brine by the process of__________________?

   A. Solar evaporation
   B. Vacuum evaporation
   C. Freeze drying
   D. Electrolysis

2. Styrene is produced from ethyl benzene by the process of__________________?

   A. Dehydrogenation
   B. Oxidation
   C. Alkylation
   D. Dehydration

3. Solvay process as compared to dual process (i.e. modified Solvay process) ?

   A. Can use low grade brine
   B. Has less corrosion problems
   C. Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl
   D. Both B. and C.

4. The most commonly used substance to speed up the sedimentation of sewage is___________________?

   A. Lime
   B. Sulphuric acid
   C. Chlorine
   D. Sodium bisulphite

5. Nitrile rubber is produced by the polymerisation of__________________?

   A. Acrylonitrile and butadiene
   B. Acrylonitrile and styrene
   C. Isobutylene and isoprene
   D. None of these

6. Blue colour is imparted to glass by the addition of__________________?

   A. FeSO4
   B. PbO
   C. CaO
   D. NaOH

7. Lubricating greases are a mixture of__________________?

   A. Mineral oil, soap and additives
   B. Mineral oil and metallic soap
   C. Mineral oil and fatty oil
   D. Fatty oil and metallic soap

8. Synthesis gas is a mixture of__________________?

   A. CO and H2
   B. N2 and H2
   C. H2, CH4 and CO
   D. CO2 and H2

9. Portland cement consists mainly of__________________?

   A. CaO & SiO2
   B. SiO2 & Al2O3
   C. CaO & Al2O3
   D. CaO & Fe2O3

10. Chloral is used in the manufacture of__________________?

    A. DDT
    B. BHC
    C. Parathion
    D. None of these