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Q.

In the reaction, 2HgO→2Hg+O2 , Hg2+ act as

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a

Reducing agent 

b

Oxidized 

c

None of the above

d

Oxidizing agent 

answer is A.

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Detailed Solution

  • In the reaction, 2HgO→2Hg+O2, the oxidation states of Hg and O.
  • The oxidation state of Hg changes from +2 to 0 i.e. Hg gets reduced. Whereas, the oxidation state of O changes from -2 to 0 . Oxygen gets oxidized. So, Hg2+ gets reduced and oxidized O. Hence, it acts as an oxidizing agent (a substance that causes oxidation by accepting electrons and itself gets reduced). 
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