The most abundant constituent in air is

A. hydrogen

B. nitrogen

C. oxygen

D. noble gases

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  1. An example of thermo setting plastics is
  2. Galvanised iron sheets are protected from rusting due to the presence of a layer of
  3. The metal which reacts most violently with cold water is
  4. The first organic compound prepared in the laboratory was
  5. The Long Form of the Periodic Table is based on
  6. The scientist associated with the discovery of the nucleus was
  7. Annealing of glass is done in
  8. Water always contains hydrogen and oxygen in the ratio 1:8 by weight. This is in accordance with the
  9. Carbogen is used in
  10. Which one of the following is used for dry cleaning?
  11. Compounds containing only carbon and hydrogen are called
  12. The process that takes place in the atom bomb is
  13. Rayon la made from
  14. Clark's method for removal of temporary hardness in water uses
  15. During fermentation, the by-product is
  16. Stainless steel contains steel and
  17. Ascorbic acid is the chemical name for
  18. Biogas is obtained during
  19. Which of the following is not a metal?
  20. The most abundant constituent in air is
  21. The rate of setting of cement is slowed down by the addition of
  22. Which of the following cannot be used for the preparation of soap?
  23. An acid which is used as a preservative for pickles is
  24. The compound used in photography is
  25. A compound used both as a fungicide and as a disinfectant is
  26. Ozone is an allotrope of Oxygen, containing ______ atom/s of oxygen per molecule instead of two.
  27. A drug that is usually administered for malaria is
  28. Penicillin was discovered by
  29. Which of the following is used as an illuminant?
  30. A common rodenticide is (Rat Poison)