1.

Iron nails are dipped into blue copper sulphate solution. After sometime iron nails are

Answer»

dissolved and blue colour is DISCHARGED
dissolved but blue colour is not discharged
not dissolved and blue colour is not discharged
not dissolved but blue colour is discharged

Solution :Iron is more REACTIVE than copper , thus DISPLACES copper from copper SULPHATE solutions.
`Fe + underset("blue")(CuSO_(4)) to underset("green")(FeSO_(4)) + underset("red-brown")(Cu)`
The copper formed get deposited over the iron nail and blue colour of the solution gradually disappears and REMOVED from the solution.


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