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    • Question

      Humic substance, which is most resistant to microbial

      attack is:
      A Fulvic acid Correct Answer Incorrect Answer
      B Humic acid Correct Answer Incorrect Answer
      C Humin Correct Answer Incorrect Answer
      D Both b & c Correct Answer Incorrect Answer
      E None of the above Correct Answer Incorrect Answer

      Solution

      Humin: Highest in molecular weight, darkest in colour, insoluble in both acid and alkali and most resistant to microbial attack. Polymerized product of a part of the FA and HA fractions.   

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