MEDIUM
8th CBSE
IMPORTANT
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Does pure water conduct electricity? If not, what can we do to make it conducting?
Important Questions on Chemical Effects of Electric Current
MEDIUM
8th CBSE
IMPORTANT
In case of a fire, before the firemen use the water hoses to throw water to douse fire, they shut off the electricity supply for the area. Explain why this is done.
MEDIUM
8th CBSE
IMPORTANT
Which effect of electric current is utilised when a thin layer of chromium metal is deposited on an iron tap? What is this process known as?
MEDIUM
8th CBSE
IMPORTANT
For electroplating copper on an iron object, which terminal of the battery (positive or negative) is connected to the iron object? Also name the electrolyte you will use for this purpose.
MEDIUM
8th CBSE
IMPORTANT
What is meant by the chemical effect of electric current? Explain with the help of an example.
EASY
8th CBSE
IMPORTANT
Name any two applications of the chemical effect of electric current.
MEDIUM
8th CBSE
IMPORTANT
What is electrolysis? Explain why, in the electrolysis of water, 'acidified water' is used.
EASY
8th CBSE
IMPORTANT
Name three types of substances in which an electric current can produce a chemical effect.
MEDIUM
8th CBSE
IMPORTANT
State some of the characteristics of chemical changes brought about by the chemical effect of electric current.
