Question 1 Name two metals which are usually electroplated on cheaper metals for making jewellery? Question 2 What properties of chromium make it suitable for electroplating it on car bumpers, bath taps and bicycle handlebar? Question 3 What properties of tin make it suitable for storing food? Question 4 Which is the polluting waste generated by electroplating … [Read more...] about Uses of electroplating
Class 8
Purification of metal
Question 1 Name few application of chemical effects of electric current? Question 2 Name few compounds which are produced by using chemical effect of current? Question 3 Name 2 metals which are purified by using the chemical effect of current? Question 4 Describe how you will purify a strip of impure copper by using chemical effect of electric current? Purification … [Read more...] about Purification of metal
Weak conductors of electricity
Question 1 How will you show that vinegar and lemon juice are weak conductors of electricity? Question 2 How will you show that ordinary water or tap water is a weak conductor of electricity? When an electric current is passed through vinegar taken in a beaker ,then the bulb glows very dimly. The very dim glowing of bulb indicates that though vinegar and lemon … [Read more...] about Weak conductors of electricity
Electroplating
Question 1 Name few applications of chemical effect of electric current? Question 2 What is electroplating? Question 3 Name the metal which is electroplated on car parts such as bumpers and bicycle handle bars? Question 4 Which metal is electroplated on iron making cans used for storing food? Question 5 What is the purpose of electroplating? Question 6 Why does a … [Read more...] about Electroplating
Chemical effect of electric current
Question 1 Define the term chemical effects? Question 2 What is electrolysis? Question 3 What is an acidified water? Question 4 Name one compound which is decomposed into hydrogen and oxygen by using chemical effects of electric current? Question 5 What should be done to decompose water into hydrogen and oxygen? Question 6 Acidified water is electrolysed by … [Read more...] about Chemical effect of electric current