A thin plate of pure copper and a thick rod of impure copper are used as electrodes for purification of copper. Which electrode should be attached to the positive terminal of the battery and why? [3 marks]

Open in App

Solution

(1 mark for image)

A thick rod of impure copper should be attached to the positive terminal of the battery. (0.5 marks)

The thin plate of copper should be attached to the negative terminal of the battery. (0.5 marks)

This is because the copper ions from the positive terminal will get attracted to the negative terminal. Only the copper from the impure rod will get transferred to the negative terminal and we will get pure copper at the cathode. (0.5 marks)

The impurities will not get attracted to the negative terminal. They will stay near the anode and make anode mud of impurities. (0.5 marks)

Suggest Corrections

Similar questions

In the process of purification of copper metal, a thin plate of pure copper and a thick rod of impure copper are used as electrodes, and a metal salt solution is used as an electrolyte :
(a) Which electrode is connected to the positive terminal of the battery ?
(b) Which electrode is connected to the negative terminal of the battery ?
(c) Which metal salt solution is taken as electrolyte ?

Q. Q1 ROHIT WANTS TO TRANSFER COPPER FROM ONE IMPURE ROD TO THIN COPPER PLATE BY PASSING ELECTRIC CURRENT. WHICH ELECTRODE SHOULD BE ATTACHED TO POSITIVE AND NEGATIVE TERMINAL OF THE BATTERY AND WHY? DON'T GIVE LINKS

Q. If we want to pure a impure copper plate then it should be attached in place of electrode connected to negative terminal or positive terminal when the electrodes are immersed in CuSo4 solution?

The diagram shows the process of purification of copper metal. A thick copper plate

A

of impure copper and a thin copper plate

B

are immersed in a metal sulphate solution and an electric current is passed through it. Which metal solution is taken as electrolyte ?

Q. Copper deposition takes place on the electrode connected to the battery terminal during the electroplating of copper electrodes.

Join BYJU'S Learning Program