Decolourisation of acidified potassium permanganate occurs when $H_2O_2$ is added to it,this is due to

  • A
    Oxidation of $KMnO_4$
  • B
    Reduction of $KMnO_4$
  • C
    Both oxidation & reduction of $KMnO_4$
  • D
    None of the above

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In $H_2O_2$ molecule,the dihedral angle between the two $O-H$ planes is ............. $^o$.

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