Among the following n - factor is highest for 

  1. A

    Al2(SO4)3

  2. B

    KMnO4 in acidic medium

  3. C

    H3PO2

  4. D

    Na2CO3

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    Solution:

    n - factor is number of electrons lost or gained per molecule or number of replaceable H+ or OH- ions and total positive charge on the cation

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