1.

Which of the following is a redox-reaction-

Answer»

`2NA[Ag(CN)_(2) ]+Zn rarr Na_(2) [Zn(CN)_(4) ]+2Ag`
`BaO_(2) + H_(2)SO_(4) rarr BaSO_(4) + H_(2) O_(2)`
`N_(2)O_(5) + H_(2) O rarr 2HNO_(3)`
`AgNO_(3) + KI rarr AGI + KNO_(3)`

Answer :A


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