Which of the following groups of molecules act as both an oxidising agent and a reducing agent?

  • A
    $KMnO_4, O_3, SO_3$
  • B
    $HClO_4, HNO_2, H_2O_2$
  • C
    $HClO_2, SO_2, H_2O_2$
  • D
    $K_2Cr_2O_7, SO_2, H_2SO_4$

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Which of the following may act as both an oxidising and a reducing agent?

$A$ sulphur-containing species that can not act as a reducing agent is

Which of the following reactions depicts the oxidizing behavior of $H_2SO_4$?

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In the reaction $C + H_2O \to CO + H_2$,$H_2O$ acts as:

The oxide which cannot act as a reducing agent is

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