HARD
8th CBSE
IMPORTANT
Earn 100

Draw a circuit diagram showing a dry cell connected to a bulb through a switch. Mark the positive and the negative terminals of the cell, the direction of flow of electron and conventional current.

Important Questions on Chemical Effects of Electric Current

MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q D
What are the advantages of electroplating iron with chromium?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q D
Discuss what happens when an electrolyte is dissolved in water, and then an electric current is passed through it.
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q D
What happens when electricity is passed through tap water?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q E
How will you show experimentally that an electric current can bring about a chemical change? What is this phenomenon called?
HARD
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q E
What is electroplating? How will you carry out electroplating of copper in the laboratory?
HARD
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q E
List four uses of electroplating, giving the reason for electroplating in each case.
EASY
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q 1
Which of these do you think uses less electrical energy- electric bulb or LED?
MEDIUM
8th CBSE
IMPORTANT
Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q 2
Mercury is a liquid and conducts electricity. Do you think it is an electrolyte?