Take solutions of hydrochloric acid or sulphuric acid. . Fix two nails on a cork and place the cork in a 100 ml beaker. . Connect the nails to the two terminals of a 6V battery through a bulb and a switch as shown in Figure. . Now pour some dilute HCl in the beaker and switch on the current. Repeat the activity with dilute sulphuric acid, glucose and alcohol solutions. What do you observe now? . Does the bulb glow in all cases?

Take solutions of hydrochloric acid or sulphuric acid. . Fix two nail

1.	Take solutions of hydrochloric acid or sulphuric acid. . Fix two nails on a cork and place the cork in a 100 ml beaker. . Connect the nails to the two terminals of a 6V battery through a bulb and a switch as shown in Figure. . Now pour some dilute HCl in the beaker and switch on the current. Repeat the activity with dilute sulphuric acid, glucose and alcohol solutions. What do you observe now? . Does the bulb glow in all cases?
Answer» Solution :The bulb GLOWS when the solution in the beaker is hydrochloric ACID or sulphuric acid as they ionise into `H^(+)` ions thus facilitating the flow of current. Both hydrochloric acid and sulphuric acid readily ionise to `H^(+), Cl^(-) and 2H^(+) and SO^(4-)` in solution and thus CONDUCT ELECTRICITY letting the bulb glow. Wherens glucose and ALCOHOL do not ionise and hence the bulb doesn.t glow.