Phosphoric acid is prepared from

A. Cryolite

B. Chalcopyrite

C. Rock phosphate

D. None of these

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  1. Pick out the wrong statement.
  2. Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
  3. In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations…
  4. Which of the following is a bleaching agent added in the detergents to facilitate removal of stains…
  5. Fusel oil is a/an
  6. Which of the following is the second major component of cement?
  7. Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
  8. Presence of H2S in raw water (to be chlorinated) results in the
  9. Vanillin is a type of
  10. Fourdrinier machine is used in the manufacture of
  11. The main use of HCl is in the
  12. High acid value of an oil or fat is an indication of
  13. Phenol formaldehyde resin is used as an adhesive in making
  14. Hydrogenation of oil does not
  15. Solvent used for extraction of oil is
  16. Cation exchanger is regenerated usually with
  17. Concentration of hydrogen peroxide is done by
  18. Percentage of glycerine present in the spent lye obtained during soap manufacture is about
  19. Alcohol content in freshly prepared natural and fortified wine may be respectively around __________…
  20. Which of the following is not produced commercially from sea water?
  21. Major component of flint glass is
  22. Production of one ton of cement requires about __________ tons of limestone.
  23. Isopropyl benzene produced by alkylation of benzene with propylene is known as
  24. Which form of sulphur is the most stable at room temperature?
  25. A unit operation is exemplified by the process of
  26. Which is the most suitable dye for synthetic fibres?
  27. Main constituents of Portland cement are calcium aluminate and
  28. The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold…
  29. Caprolactam (a raw material for nylon-6 manufacture) is produced from
  30. Which of the following is not present in bagasse fibre?