Lakhmir Singh and Manjit Kaur Solutions for Chapter: Chemical Effects of Electric Current, Exercise 3: Long Answer Type Questions

What is electrolysis? Explain why, in the electrolysis of water, 'acidified water' is used.

Name three types of substances in which an electric current can produce a chemical effect.

State some of the characteristics of chemical changes brought about by the chemical effect of electric current.

Why does an electric bulb glow when a current passes through it ?

What is meant by electroplating? What is the purpose of electroplating?

Which properties of chromium metal make it suitable for electroplating it on car bumpers, bath taps and bicycle handlebars, etc., made of iron ?

A strip of impure copper metal is given to you. Describe briefly how you will purify it by using the chemical effect of electric current. Draw a labelled diagram of the experimental set up used for this purpose.

With the help of a labelled diagram, describe briefly how an iron key can be electroplated with copper.