MEDIUM
8th CBSE
IMPORTANT
Earn 100
State three uses of the phenomenon of electrolysis.
Important Questions on Electric Current and Its Chemical Effects
MEDIUM
8th CBSE
IMPORTANT
Give reasons for the following:
Solid sodium chloride does not conduct electricity while sodium chloride solution conducts.
MEDIUM
8th CBSE
IMPORTANT
Give reasons for the following:
It is not safe to carry out electrical repairs outdoors during a heavy downpour.
HARD
8th CBSE
IMPORTANT
Give reasons for the following:
To carry out electrolysis of water, a few drops of sulphuric acid are (carefully) added to the water.
MEDIUM
8th CBSE
IMPORTANT
Give reasons for the following:
Kitchen gas burners are often coated with chromium.
HARD
8th CBSE
IMPORTANT
Define 'electroplating'. How can steel spoons be plated with silver?
HARD
8th CBSE
IMPORTANT
State any three uses of electroplating.
HARD
8th CBSE
IMPORTANT
Describe an experiment to show that we can get electrical energy by using a magnet.
HARD
8th CBSE
IMPORTANT
A coil of insulated copper wire is connected to a torch bulb. State the likely 'response' of the bulb, if a bar magnet is pushed into the coil.
