In nature, ……….. and ……….. provide enough energy to convert Nitrogen to nitrogen oxides (NO, NO2, N2O).

  1. Lightning, Forest fires
  2. Industrial combustions, UV radiation
  3. Forest fire, Lightning
  4. Lightning, UV radiation
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Decomposition of organic nitrogen of dead plants and animals into ammonia is called

  1. Nitrogen Fixation
  2. Ammonification
  3. Nitrification
  4. Denitrification
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Which of the type of fixation leads to fixation of atmospheric nitrogen to ammonia?

  1. Biological nitrogen fixation
  2. Industrial nitrogen fixation
  3. Electrical nitrogen fixation
  4. Both A and B
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Electrical nitrogen fixation leads to

  1. Formation of Nitrate
  2. Formation of Nitrite
  3. Formation of Ammonia
  4. Formation of Nitrogen
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Ammonia is first oxidized to nitrite by the bacteria except

  1. Nitrosomonas
  2. Nitrococcus
  3. Nitrobacter
  4. All of these
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Nitrite is oxidized to Nitrate by the bacterium

  1. Nitrococcus
  2. Nitrosomonas
  3. Nitrobacter
  4. Thiobacillus
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Nitrification does not include

  1. Conversion of ammonia to nitrite
  2. Conversion of nitrite to nitrate
  3. Conversion of nitrogen to ammonia
  4. Both B and C
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The nitrifying bacteria are

  1. Photoautotroph
  2. Chemoautotroph
  3. Nitrotroph
  4. Organotroph
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Denitrification occurs in

  1. Leaves
  2. Roots
  3. Soil
  4. Environment
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Plants absorb which form of Nitrogen?

  1. Ammonia
  2. Nitrate
  3. Nitrite
  4. Nitrogen
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