Question

Why is there a greenish blue spot in potato after electricity is passed

Answer 1

The electrons from negative potential of battery through copper wire reach in potato where they undergo in electrolysis of part of copper wire inside the potato in the presence of potato juice (starch). ... This is the reason of greenish spots in potato on passing current through it.

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Answer 2

This is due to the chemical effect of electricity that occurs when electricity is passed through it.If noticed the spot is always seen near the positive wire but reason for this phenomenon is not known clearly.

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