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The most widely used coagulant for removing suspended impurities from water is

A. Bleaching powder

B. Chlorine

C. Calcium sulphate

D. Alum

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. __________ is a thermosetting plastic.
  2. __________ iron is the purest form of iron.
  3. Production of one ton of cement requires about __________ tons of limestone.
  4. Starting raw material for the manufacture of Maleic anhydride is
  5. Potassium is kept & transported under
  6. __________ is used as a flux in the smelting of copper ore like chalcopyrite.
  7. In the manufacture of viscose rayon, the raw material used industrially is
  8. Pick out the wrong statement.
  9. Coke used for the production of calcium carbide should have
  10. Which of the following is not produced commercially from sea water?
  11. Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is…
  12. In an integrated steel plant, NH3 present in coke oven gas is normally recovered as
  13. The catalyst used in shift converter is
  14. Poly Vinyl Chloride (P.V.C.) is a __________ material.
  15. Which of the following is not an insecticide?
  16. 'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of
  17. Heating of __________ to 120°C, produces plaster of paris.
  18. Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst…
  19. Impurities present in brine is normally removed by treatment with
  20. Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of
  21. Molasses is the starting material for the production of
  22. Brackish water which contains mostly dissolved salt, can be purified by the __________ process.
  23. __________ process is used for the manufacture of sodium carbonate by ammonia soda process.
  24. H2S is scrubbed from refinery gases by absorption using
  25. Oxidation of SO2 to SO3 is favoured by
  26. Main constituents of natural rubber is
  27. Roasting of metallurgical ores is done mainly to
  28. __________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
  29. The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
  30. Presence of sodium tripolyphosphate (an additive) in synthetic detergent