Electric bulbs are made of __________ glass.

A. Jena

B. Flint

C. Crookes

D. Pyrex

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

You can do it
  1. __________ of rubber decreases after its vulcanisation.
  2. In industrial nomenclature, alcohol means
  3. Fermentator temperature during production of alcohol from molasses is around __________ °C.
  4. __________ is a thermosetting plastic.
  5. Trinitro-toluene (TNT) is
  6. An oil is converted into fat by its
  7. Mercury cells for caustic soda manufacture, compared to diaphragm cells
  8. Glycerine is a by-product of the __________ industry.
  9. Low temperature carbonisation of coal takes place at __________ °C.
  10. Alcohol is produced by the
  11. The main use of HCl is in the
  12. Use of chlorine in the treatment of sewage
  13. Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
  14. Chemical formula of oleum is
  15. Metallic soap is __________ salt of fatty acids.
  16. Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
  17. Permanent hardness of water is due to the presence of calcium & magnesium
  18. __________ is produced using molasses as the starting raw material.
  19. Carboxymethyl cellulose (CMC) is added in detergents to
  20. Starting raw material for the manufacture of Maleic anhydride is
  21. Naphthols are derivates of
  22. Fusion of bauxite and __________ produces high alumina cement.
  23. Fusel oil is a/an
  24. Pick out the wrong statement.
  25. Phthalic anhydride is used
  26. __________ process is used for the manufacture of sodium carbonate by ammonia soda process.
  27. __________ is a thermosetting plastic.
  28. Commercially ethylene is produced from naphtha by
  29. Solvent extracted oil
  30. Starting material for the commercial production of ethyl alcohol in India is