Production of one ton of cement requires about __________ tons of limestone.

A. 0.6

B. 1.2

C. 2.2

D. 3.8

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  1. Sulphuric acid saturated with SO3 is called
  2. Phenolic antiseptics are added in the __________ soap.
  3. The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
  4. Contact process of sulphuric acid manufacture
  5. Fermentation is adversely affected by the
  6. __________ is an ore concentrating metallurgical process involving a chemical change.
  7. Lurgi coal gasifier is a pressurised __________ bed reactor.
  8. Helium is produced on commercial scale from
  9. What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in…
  10. Extraction of __________ employs an electrolytic process.
  11. Viscose rayon is chemically
  12. Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt…
  13. __________ process is used for the manufacture of sodium carbonate by ammonia soda process.
  14. Carbon tetrachloride (CCl4) is the starting raw material for the manufacture of
  15. Oxygen is produced by fractionation of air using __________ process.
  16. Pick out the wrong statement. Iodine value of an oil or fat is
  17. Teflon is
  18. 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained…
  19. The most reactive allotropic form of phosphorus is __________ phosphorus.
  20. Very dilute solutions are generally used in fermentation reactions for which the optimum temperature…
  21. Manufacture of phthalic anhydride uses __________ as a catalyst.
  22. Which glass is usually used in optical work?
  23. Which of the following is not a pyrite ore?
  24. Viscose rayon is
  25. Hydrogenation of oil takes place in a/an __________ reactor.
  26. Sodium chloride content in sea water is about __________ gms/litre.
  27. Shrinkage volume in cement setting does not depend upon the
  28. Separation of fresh water from sea water can be done by the __________ operation.
  29. Resistance to fusion of the refractory under a steady rising temperature condition is called
  30. CaSO4 . ½H2O is known as