EASY
8th CBSE
IMPORTANT
Earn 100
The object to be electroplated is taken as (cathode / anode) electrode.
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Important Questions on Chemical Effects of Electric Current
EASY
8th CBSE
IMPORTANT
One of the most common applications of chemical effect of electric current is _____.
(Choose from the following: electric bell/ electric fuse/ electroplating)
EASY
8th CBSE
IMPORTANT
Small amount of mineral salt present naturally in water makes it a _____ of electricity. (conductor / insulator)
EASY
8th CBSE
IMPORTANT
Electroplating of _____ is done on objects like water taps and cycle bells to give them a shiny appearance.
(Nickel/Chromium)
EASY
8th CBSE
IMPORTANT
Why is a layer of zinc coated over iron?
EASY
8th CBSE
IMPORTANT
Will the solution of sugar in distilled water conduct electricity?
EASY
8th CBSE
IMPORTANT
Name the effect of current responsible for the glow of the bulb in an electric circuit. (Magnetic effect of current / Heating effect of current)
MEDIUM
8th CBSE
IMPORTANT
Boojho made the circuit given in figure and observed that the bulb did not glow. On Paheli's suggestion he added one more cell in the circuit. The bulb now glows. Explain.
HARD
8th CBSE
IMPORTANT
Paheli set up an experiment using liquid in the beaker as shown in figure. She observed that the bulb glows. Then she replaced the liquid by another liquid . This time the bulb did not glow. Boojho suggested replacing the bulb by an LED. They observed that the LED glows. Explain.
