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The Process that You Saw in Activity 14.7 is Used for Purification of Copper. a Thin Plate of Pure Copper and a Thick Rod of Impure Copper Are Used as Electrodes. Copper from Impure Rod is Sought to Be Transferred to the Thin Copper Plate. Which Electrode Should Be Attached to the Positive Terminal of the Battery and Why - CBSE Class 8 - Science

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Question

The process that you saw in Activity 14.7 is used for purification of copper. A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transferred to the thin copper plate. Which electrode should be attached to the positive terminal of the battery and why?

Solution

Copper ion is positively charged. It is attracted towards the plate which is connected to the negative terminal of the battery. As copper ions are transferred to the thin copper plate, this thin pure copper plate must be connected to the negative terminal of the battery. Consequently, impure copper rod is connected to the positive terminal of the battery.

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 NCERT Solution for Science Textbook For Class 8 (2018 to Current)
Chapter 14: Chemical Effects of Electric Current
Q: 12 | Page no. 181
Solution The Process that You Saw in Activity 14.7 is Used for Purification of Copper. a Thin Plate of Pure Copper and a Thick Rod of Impure Copper Are Used as Electrodes. Copper from Impure Rod is Sought to Be Transferred to the Thin Copper Plate. Which Electrode Should Be Attached to the Positive Terminal of the Battery and Why Concept: Chemical Effects of Electric Current.
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