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#Question id: 933


Industrially, nitrogen for use in fertilizers is converted to ammonia by ________.

#Zoology
  1. a simple, energy efficient reaction of N2 with water

  2. a cryogenic (very low temperature) process between N2 and H2

  3. special catalysts which drive the reduction of N2 by H2

  4. a reaction between nitric acid and hydrogen gas


Answer:- Option(s): 3


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