The given diagram shows the electrolysis of a concentrated aqueous solution containing both copper (II) ions and sodium ions. Which metal is deposited at the negative electrode and why?

Metal deposited = Copper, Reason = Copper is less reactive than sodium

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Metal deposited = Copper, Reason = Copper is more reactive than hydrogen

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Metal deposited = Sodium, Reason = Copper is less reactive than hydrogen

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Metal deposited = Sodium, Reason = Copper is more reactive than sodium

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Solution

The correct option is B Metal deposited = Copper, Reason = Copper is less reactive than sodium
When electric current is passed through cathode positively charged ions move from this solution to cathode and in the solution if cations present are copper and sodium then sodium ions remains in the solution state as they are highly reactive while copper ions being inert in solution state move rapidly towards the cathode and get deposited.

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Similar questions

Q. Sodium is less reactive than copper.

Assertion: Upal observed that copper is deposited on the negative electrode connected to the terminal of the battery. Kavya performed the same experiment but she replaced the copper electrode with a carbon electrode and still observed copper is deposited over carbon rod.

Reason: Copper sulphate solution dissociates into copper and sulphate ions when electricity is passed through dilute copper sulphate solution and this free copper ions deposit on the carbon rod.

Q. In a solution of silver nitrate, a copper plate was dipped. After some time, silver from the solution was deposited on the copper plate. Which metal is more reactive, copper or silver?

Is copper more reactive than hydrogen?

Then which elements are more reavtive than hydrogen and also copper?

A metal less reactive and another metal more reactive than hydrogen are
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