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Tbe diagram shows the process of purific...

Tbe diagram shows the process of purification of copper metal A thick copper p]ate 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 electrode is connected to the negative terminal of the battery?

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The thin plate of pure copper. It is made the negative electrode (cathode)
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