Around which electrode, (positive or negative electrode) the coloured spot is formed.
When an electric current is passed through a cut potato for a considerable time, a coloured spot is formed around one of the electrodes :
(a) What is the colour of the spot ?
(b) Around which electrode (positive or negative electrode) the coloured spot is formed ?
(c) Which effect of electric current is involved in this case ?
During electrolysis of acidified water ________ will be formed on the positive electrode while _________ will be formed on the negative electrode