Q. In India, the steel production industry requires the import of

  • Saltpetre
  • Rock phosphate
  • Coking coal
  • All of the above

Answer: (c) Coking coal

Notes:

  • Saltpetre (Potassium nitrate)is not used in the production of Steel.
    • It is used in the production of fertilizers, tree stump removal, rocket propellants and fireworks.
    • It is one of the major constituents of gunpowder (black powder) and has been used since the Middle Ages as a food preservative.
  • Rock phosphate is used in the production of fertilizer and not for the production of Steel. 
  • India imports coking coal.
    • The production of steel requires 0.8 tonnes of coking coal to produce one tonne of Steel.