When an electric current is passed through a conducting solution the following observations may be seen:

1. change in color:

when electric current is passed through a conducting solution, chemical effect of current is seen which can change the chemical composition of the solution. Therefore, depending on the nature of the solution, different chemical changes will take place which may result in change of color of solution.

2. increase in temperature

we know that electric current produces heating effect. when it is passed through a conducting solution, it is possible that solution becomes warmer due to increase in its temperature. This property has many industrial uses.

3.formation of bubbles near the electrode

due to chemical effect of current bubbles can be seen near the electrode. For example, if electrodes are immersed in water and a current is passed bubbles of oxygen and hydrogen are produced. Oxygen bubbles are formed on the electrode connected to positive terminal of battery and hydrogen on the other side