Question

Give an experiment to show that the chemical effect of current.

Answer 1

Take two iron nail

- Clean it with sand paper.

Wrap copper wire around both the nails. And connect the other end to the battery terminal.

Take water in beaker and little amount of salt in it or a few drpos of sulphuric acid in it.

- Immerse the nails in the solution.

- Observe the nails carefully. You can see bubbles of gases coming out from water near nails.

When, electeric current is passed through water gases like hydrogen and oxygen are evolving

Answer 2

Aim: To study the chemical effect of current
Materials required : water, copper sulphate crystals, iron rod, a copper rod and glass jar
Procedure : take some water in a glass jar. take some crystal of copper sulphate and dissolve them in water taken in a glass jar. Now take a long iron rod or an iron nail. Also make a copper rod or copper plate. clean them with sand paper. make a experimental arrangements as shown in figure
pass the circuit in the circuit by closing the switch
watch the nail carefully
Observantion : after some time you will see that how that the portion of iron rod dipped in copper sulphate solution gets coated with a layer of copper.
Conclusion : when electric current is passed through copper sulphate solution, it gets decomposed into copper and sulphate ions