Font size
WorksheetsChemical effects of electric current
Total questions: 19
Worksheet time: 7mins
Milk is an ................ in the purest form.
Non electrolyte
Electrolyte
Both
The 2 wires of LED known as
Electrodes
Metal Wires
Leads
none
Most liquids that conducts electricity are solutions of
salt
bases
acids
All of these
Tin is more reactive than iron
True
False
On which electrode most bubbles are formed in the tape water
Anode
Cathode
none
both
On which electrode the greenish blue spot is formed?
cathode
anode
When the current is passed through tape water, then oxygen bubbles and hydrogen bubbles forms in which electrode
Oxygen bubbles will form on cathode and Hydrogen bubbles will form on anode
Oxygen bubbles will form on anode and Hydrogen bubbles will form on cathode
none
both
Does chromium has shiny appearance
Yes
No
Although the rainwater is pure but when we collect the rain water it become Elecrolyte. Why?
It is exception
Because of air pollutants
none
Because pure rainwater is a electrolyte
Mineral salt in water makes the solution
good conductor
poor conductor
none
Is electroplating a example of electrolysis
yes
no
When we electroplate copper on iron spoon, then on which electrode do we take copper plate?
cathode
anode
both
Some chemical effects are
Change of colour may be seen
bubbles of gases may be formed
change of smell may occur
Carbon dioxide may be formed
Deposition of metals may be seen
What is Electrolysis?
The process of coating of a superior metal on the any object.
A liquid substance which allows electric current to pass through it.
It is process of flowing of electric current through a liquid causing chemical effects.
Copper sulphate solution is a ________
non-electrolyte
Electrolyte
none
The long wire in a LED is
positive
negative
both
Bulb glows due to which effect?
Heating
Magnetic
both
none
In which of these, there will be more glow of bulb when current is passed through them
lemon juice
acetic acid
hydrochloric acid
Which of these is not a electrolyte?
saline water
hydrochloric acid
petrol
vinegar
