Differentiate between conductors and insulators.

Important Questions on Chemical Effects of Electric Current

EASY

8th CBSE

IMPORTANT

Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q C

What is an electrolyte?

EASY

8th CBSE

IMPORTANT

Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q C

Why is zinc electroplated on iron?

HARD

8th CBSE

IMPORTANT

Living Science 8>Chapter 18 - Chemical Effects of Electric Current>EXERCISES>Q D

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.

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?