Which of the following is a redox r...

Which of the following is a redox reaction ?

`NaCI + KNO_3 to NaNO_3 + KCI`

`CaC_2 O_4 +2 HCI to Ca CI_2 +H_2 C_2 O_4`

`Mg(OH)_2 +2NH_4 Ci to MgCI_2 +2 NH_4 OH `

`Zn +2AgCN to +Zn (CN)_2`

Verified by Experts

The correct Answer is:

`Zn to zn^(2+) + 2e^(- ) + 2e^(- ) ,Ag ^( +) + e^(-) overset("Red ") to Ag `

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