Question

If an electric current is passed through a cut potato for some time, then there would be a colored spot on the potato around one wire and no such spot around the other wire.

State the colour of the spot.

Answer 1

Correct option is A. Greenish blue
The potato turns greenish blue when connected to the positive terminal, the electrons from the negative terminal of the battery move inside the potato as the electrolysis occurs at the copper wire inside potato. This electrolysis conducted by the presence of starch in potato which produces more electrons.