1.

Which of the following is a redox reaction?

Answer»

`NaCl+KNO_(3) to NaNO_(3)+KCL`
`CaC_(2)O_(4) +2HCl to CaCl_(2)+H_(2)C_(2)O_(4)`
`Mg(OH)_(2)+2NH_(4)CL to MgCl_(2)+2NH_(4)OH`
`Zn+2AgCN to 2Ag +Zn(CN)_(2)`

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