Oxidation and reduction — task. Chemistry CBSE Live product, Pre-Crash Course.

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Iron nails are dipped in blue copper sulphate solution. After some time, the solution turns green and a reddish-brown coating appears on the nail. Which conclusion is correct?

Iron is oxidised to \(Fe^{2-}\) and \(Cu^{2+}\) is reduced to copper
Iron is oxidised to \(Fe^{+}\) and \(Cu^{2-}\) is reduced to copper
Iron is oxidised to \(Fe^{2+}\) and \(Cu^{2+}\) is reduced to copper
Iron is oxidised to \(Fe^{2-}\) and \(Cu^{2-}\) is reduced to copper

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6. Oxidation and reduction

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