The most commonly used substance to speed up the sedimentation of sewage is

A. Lime

B. Sulphuric acid

C. Chlorine

D. Sodium bisulphite

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  1. Which of the following is used as a binding material in soap to improve soap texture?
  2. Catalytic oxidation-dehydrogenation of methyl alcohol produces
  3. Presence of carbonaceous matter in the sewage
  4. Which of the following is a detergent?
  5. Oils are partially hydrogenated (not fully) to manufacture Vanaspati, because fully saturated solidified…
  6. Naphthalene is removed from coke oven gas by
  7. Which glass is usually used in optical work?
  8. __________ is not a constituent of gun powder.
  9. Which of the following is an additional step in the manufacture of paper from bagasse as compared to…
  10. Diaphragm electrolytic cell as compared to mercury electrolytic cell
  11. The most widely used coagulant for removing suspended impurities from water is
  12. Fluorescent dyes are added in detergents to
  13. Vegetable oils and fats basically differ in their
  14. Hydrogenation of oil/fat does not
  15. Trinitrotoluene (TNT), an explosive, is made by the nitration of
  16. Styrene-butadiene-rubber (SBR) as compared to natural rubber has
  17. An alkali metal salt of Palmitic acid is known as
  18. Portland cement consists mainly of
  19. The major constituent of black liquor generated during paper manufacture is sodium
  20. Cooking liquor in case of sulphite process is
  21. Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell…
  22. Shrinkage volume in cement setting does not depend upon the
  23. Parathion and Malathion are
  24. All enzymes are made of
  25. Viscose rayon
  26. Which is the most suitable dye for synthetic fibres?
  27. Reaction of calcium carbide with water produces a gas, which is used
  28. Pig iron is produced by blast furnaces in India using mostly the iron ore named
  29. Varnish does not contain
  30. Phenol formaldehyde is produced by condensation polymerisation. It is also known as