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Discussion :: UPSC Civil Service Exam Questions

  1. The correct sequence of the sludge digestion steps is

    2. A.
    Acid formation, hydrolysis, methane formation
    B.
    Methane formation, acid formation, hydrolysis
    C.
    Hydrolysis, methane formation, acid formation
    D.
    Hydrolysis, acid formation, methane formation

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    Answer : Option D

    Explanation :

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