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Lakhmir Singh Solutions Class 8 Science Solutions for Exercise in Chapter 14 - Chemical Effect Of Electric Current

Question 34 Exercise

A beaker contains an acidified copper sulphate solution. A copper plate and a carbon rod are kept in this copper sulphate solution. The copper plate is connected to the positive terminal of a battery whereas the carbon rod is connected to the negative terminal of the battery. What will you observe when an electric current is passed through this set-up for a considerable time?

Answer:

Carbon is reactive than copper and when electricity is passed through it the carbon replaces copper ions and deposits on the negative electrode. Thus a red-brown layer of copper metal will be deposited on the carbon rod connected to the negative terminal of the battery.

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