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The function of nitrogen in air is

  • A.To make air a moderate supporter of combustion
  • B.To maintain the density of air constant
  • C.To prevent the hydrogen in air from exploding
  • D.To reduce the poisonous nature of ozone in air

Answer: A

Nitrogen makes air a moderate supporter of combustion.

Being chemically inert under ordinary conditions, it dilutes the oxygen. In pure oxygen things burn fiercely and fires would be uncontrollable; with 78 per cent nitrogen present, combustion proceeds at a manageable rate.

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