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WorksheetsChemical effects of electric current
Total questions: 10
Worksheet time: 6mins
which of the following is/are conductor(s)?
Metals
Electrolytes
Rainwater
All of them
Alloys of metals
allow electric current to flow through them
do not allow electric current to flow through them
sometimes allow and sometimes do not allow electric current to flow through them
None of these
Choose insulator from the following:
Distilled water
Plastic
Wood
All of them
Tin cans used for storing food are made by electroplating
copper on iron
iron on tin
tin on zinc
tin on iron
While trying to put out fire in an electrical appliance, we should
pour distilled water on it
pour rain water on it
pour tap water on it
none of these
Iron is coated with (a) to protect it from corrosion.
The article to be electroplated is made
the anode
the cathode
either anode or cathode
none of these
An (a) is an atom or molecule with an electric charge created by loss or gain of electrons.
The filament of the bulb gets heated to a high temperature due to the
magnetic effect of current
heating effect of current
chemical effect of current
all of these
During electrolysis of water,
hydrogen gas is produced
oxygen gas is produced
water is produced
both (a) and (b)
