1.

Which of the following is an oxidation and reduction reaction?

Answer»

`BaO_(2)+H_(2)SO_(4) to BaSO_(4)+H_(2)O_(2)`
`N_(2)O_(5)+H_(2)O to 2HNO_(3)`
`AgNO_(3)+KI to AgI+KNO_(3)`
`SnCl_(2)+HgCl_(2) to SnCl_(2)+HG`

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