$A$ mixture of potassium chlorate,oxalic acid,and sulphuric acid is heated. During the reaction,which element undergoes the maximum change in its oxidation number?

  • A
    $S$
  • B
    $H$
  • C
    $Cl$
  • D
    $C$

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How many moles of $MnO_4^-$ are required to completely oxidize $1 \ mol$ of ferrous oxalate in an acidic medium?

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