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The ore of iron is

A. Dolomite

B. Magnetite

C. Bauxite

D. Anglesite

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  5. Gasoline is obtained from crude petroleum by
  6. An essential condition for rusting is
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  15. CAN is used as (Calcium Ammonium Nitrate)
  16. The pure at form of iron is
  17. The main element used in the vulcani-sation of rubber is
  18. Hard water does not lather well with soap because
  19. The scientist associated with the discovery of the nucleus was
  20. A drug that is usually administered for malaria is
  21. Ozone occurs in the upper layers of air in the atmosphere because
  22. The non-metal which has a shining appearance is
  23. The best specimen for drinking purposes is
  24. Oil of winter green contains
  25. Boiler scales' contain
  26. Iron is coated with zinc to prevent rusting. The process is called
  27. Washing soda is
  28. Chloroform used as anaesthetic should be preserved In the dark in tightly stoppered bottles because…
  29. In surgical operation, the anaesthetic commonly used nowadays is
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