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
Chemical effect of electric current
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
Distilled, tap, sea and rain water
Question 1 Distilled water does not conduct electricity?Why? Question 2 What substance can be added to distilled water in small amount to make it a good conductor of electricity.Why? Question 3 Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour.Explain? Question 4 Which is a better conductor of electricity:Drinking water or … [Read more...] about Distilled, tap, sea and rain water
Detection of weak current flowing through liquid
Question 1 Write the full form of LED? Question 2 Name a device which glows even when a weak electric current passes through it? Question 3 What is it advantage of using LED in testing the electrical conductivity of liquids? Question 4 Which effect of electric current is utilised for detecting the flow of current through a solution: (a) When a torch bulb is … [Read more...] about Detection of weak current flowing through liquid
Test for conduction of liquid
Question 1 Describe an activity to show that hydrochloric acid solution conduct electricity? Question 2 Vinegar is a sour liquid.State whether vinegar conduct electricity or not? Question 3 Describe an activity to show that sugar solution do not conduct electricity? Question 4 How will you show that alcohol does not conduct electricity? Take a small beaker.Fix … [Read more...] about Test for conduction of liquid
Liquids conduct electricity
Question 1 What are good conductors of electricity?Give example? Question 2 What are bad conductors of electricity?Give example? Question 3 Do liquids conduct electricity? Question 4 What are electrolytes? Question 5 What are strong electrolytes.Give example? Question 6 What are weak electrolyte. Give example? Question 7 What is an electrode? Question 8 … [Read more...] about Liquids conduct electricity