(a) Name three types of substances in which an electric current can produce a chemical effect.
(b) State some of the characteristics of chemical changes brought about by the chemical effect of electric current.
(c) Why does an electric bulb glow when a current passes through it ?
(a) Name three types of substances in which an electric current can produce a chemical effect.
(b) State some of the characteristics of chemical changes brought about by the chemical effect of electric current.
(c) Why does an electric bulb glow when a current passes through it ?
a)An electric current can also produce a chemical effect on some other substances such as acids ,bases , salts and certain molten compounds.
When an electric currents is passed through these liquids chemical reaction takes place.
When an electric current flows through a conducting solution, it causes a chemical reaction.
b)1. The passage of an electric current through a conducting solution causes reactions.
2.As a result, bubblesof a gas may be formed on the electrodes.
3.Deposits of metal may be seen on electrodes.
4. Changes of colour of solutions may occur. The reaction would depend on what solution and electrodes are used. These are some of the chemical effects of the electric current
c)When electric current passes through a bulb, the filament of the bulb heats up to a high temperature. This is called heating effect of current. The temperature is so high that it starts glowing.
However, if the current through a circuit is weak, the filament does not get heated up sufficiently and it does not glow.
a)An electric current can also produce a chemical effect on some other substances such as acids ,bases , salts and certain molten compounds.
When an electric currents is passed through these liquids chemical reaction takes place.
When an electric current flows through a conducting solution, it causes a chemical reaction.
b)1. The passage of an electric current through a conducting solution causes reactions.
2.As a result, bubblesof a gas may be formed on the electrodes.
3.Deposits of metal may be seen on electrodes.
4. Changes of colour of solutions may occur. The reaction would depend on what solution and electrodes are used. These are some of the chemical effects of the electric current
c)When electric current passes through a bulb, the filament of the bulb heats up to a high temperature. This is called heating effect of current. The temperature is so high that it starts glowing.
However, if the current through a circuit is weak, the filament does not get heated up sufficiently and it does not glow.
