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The most stable allotropic form of phosphorous is the __________ phosphorous.

A. White

B. Black

C. Yellow

D. Red

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

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  1. Enzymes are organic catalysts used in the __________ reactions.
  2. Which of the following is a detergent?
  3. Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell…
  4. Most commonly used rubber vulcanising agent is
  5. Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt…
  6. Which of the following fuel gases contains maximum amount of carbon monoxide?
  7. Trinitrotoluene (TNT), an explosive, is made by the nitration of
  8. __________ is produced using molasses as the starting raw material.
  9. Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain…
  10. Terylene is
  11. What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in…
  12. Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4…
  13. Lurgi coal gasifier is a pressurised __________ bed reactor.
  14. Dehydrogenation of ethyl benzene produces
  15. Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?
  16. The main component of Pyrex glass is
  17. Nickel is not used as a catalyst in the
  18. __________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace.
  19. Viscose rayon
  20. Coal tar is used as a
  21. Pick out the wrong statement.
  22. Sulphur addition in soap is done to
  23. Poly Tetrafluoroethylene (P.T.F.E.) is known as
  24. Hydrogenation of vegetable oils is a/an __________ reaction.
  25. Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
  26. Common salt is generally not produced commonly by __________ method from brine.
  27. In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations…
  28. Bromine is used in the preparation of
  29. Thermoplastic materials
  30. Which of the following is not produced on commercial scale from sea water?