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

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

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

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.