1.

In which of the following reactions HNO_3will not act as an oxidizing agent?

Answer»

`HNO_3 + H_2SO_4 to `
`HNO_3 + FeSO_4 + H_2SO_4 to `
`KL + HNO_3 to `
`AU + HNO_4 to `

SOLUTION :` HNO_3 + H_2SO_4toNO_2^(+) + HSO_4^(-) +H_2O`
In this reaction `HNO_3` is acting as `OH^-` donor and `H_2SO_4` as `H^+`donor. This is not a redox reaction.


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