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WorksheetsChemical Effect of Current
Total questions: 24
Worksheet time: 16mins
Which one of the following solutions will not conduct electricity?
lemon juice
vinegar
tap water
vegetable oil
Which of the following metals is used in electroplating to make objects appear shining?
iron
aluminium
copper
chromium
Tick the chemical effect of elecric current
boiling
motion
electro shock
Electroplating
Pure or distilled water is a
poor conductor
good conductor
Both
None of the above
An electric current can produce
heating effect
chemical effect
magnetic effect
all of the above
Which of these is plated on the iron to prevent it from chemically reacting with food?
Gold
Chromium
Tin
Zinc
Electroplating prevents
electric current
chemical effect
lightening
rusting
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
A positive ion is called
cation
anion
anode
cathode
The negative terminal is called
anode
cathode
anion
cation
An ion that gets attracted towards the positive terminal of a battery is
anion
cation
During electrolysis of water, hydrogen gas is deposited at which electrode?
Positive electrode
Negative electrode
Which among the two is a better conductor?
metals
conducting liquids
The process of decomposition of electrolyte solution
into ions on passing current through it is called (a)
An apparatus in which electrolysis is carried out is called
(a)
The application of electrolysis are
Electroplating
Extraction of metals
Corrosion
Purification of metals
Characteristics of a Good Electrolyte solutions are
It should be highly soluble in water.
It should be a good conductor of electricity.
Cheap as much as possible
Should be as strong as solid
(a) is a process of depositing a thin layer of one
metal over another metal by the method of electrolysis.
(a) was the first metal that was isolated by electrolysis.
List the application of electroplating
to prevent corrosion
electroplate costly metals on less expensive metals.
for storing food by electroplating tin on iron.
To mix the silver and gold together
The impure metal is made the (a) for Purification of the metals.
The process of purification of a metal by electrolysis is known as (a)
Sometimes you may find that although the liquid is conducting, yet the bulb of the circuit does not glow because
the current is very weak
the filament doesn't get heated sufficiently
liquid is an insulator
