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Manufacture of phthalic anhydride uses __________ as a catalyst.

A. Ni

B. Cr

C. V2O5

D. Al2O3

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

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  1. Poly Vinyl Chloride (P.V.C.) is a __________ material.
  2. Polythene is a/an __________ polymerisation product.
  3. In an integrated steel plant, NH3 present in coke oven gas is normally recovered as
  4. Hydrogenation of oil does not
  5. Use of water having dissolved oxygen in boilers promotes
  6. Coke used for the production of calcium carbide should have
  7. Lindane is
  8. Which of the following coals has the highest calorific value?
  9. Pick out the wrong statement.
  10. Electro deposition of metals i.e. electroplating is never done on
  11. SO2 is bubbled through hot sugar cane juice to
  12. Most commonly used rubber vulcanising agent is
  13. Sea water contains about __________ ppm of bromine.
  14. Ordinary glass is not a/an
  15. Sucrose is a disaccharide consisting of
  16. Margarine is a/an
  17. Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove
  18. A unit operation is exemplified by the process of
  19. Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?
  20. __________ is the major constituent of the Portland cement.
  21. Frasch process is for
  22. __________ glass is used for the manufacture of optical glass.
  23. Flash point of most vegetable oils is about __________ °C.
  24. Dehydrogenation of Isopropanol produces
  25. Which of the following processes is absent in glass manufacturing process?
  26. Unsaturated oils compared to saturated oils have
  27. P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
  28. Caprolactam (a raw material for nylon-6 manufacture) is produced from
  29. Fermentator temperature during production of alcohol from molasses is around __________ °C.
  30. A mixture of chlorine & sodium bromide acts as a/an