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Ammonia is synthesised industrially by the

  • A.Ostwald process from nitric oxide
  • B.Solvay process from brine and ammonia
  • C.contact process over vanadium
  • D.Haber process over an iron catalyst

Answer: D

Nitrogen comes from air and hydrogen usually from natural gas by steam reforming. The other three named processes make nitric acid, soda ash and sulphuric acid respectively. Hydrogen usually comes from steam reforming.

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