WorksheetsElectrolysis
Total questions: 8
Worksheet time: 4mins
Name
Class
Date
1.
What is electrolysis?
a)
breaking down of a compound using a current
b)
making a compound using a current
2.
Which statement correctly describes the 2 electrodes?
a)
The anode is negative and the cathode is positive
b)
The anode and cathode are both positive
c)
The anode is positive and the cathode is negative
d)
The anode and cathode are both negative.
3.
What is the name given to the solution that is being electrolysed?
a)
Salt solution
b)
Electric solution
c)
Mineral solution
d)
Electrolyte
4.
It is essetial that the electrolyte is a liquid so that...
a)
Charged ions can migrate towards the electrodes.
b)
Charged ions can migrate towards the electrodes.
c)
The solution can move around.
d)
The current can flow through it.
5.
Positive ions (cations) will move towards the cathode (-) where they will discharge by....
a)
Breaking apart
b)
Losing electrons
c)
Clumping together.
d)
Gaining electrons
6.
When NaCl solution is electrolysed what has forms at the anode?
a)
Hydrogen
b)
Oxygen
c)
Chlorine
d)
Sodium
7.
What is the equation to show what happens to Cl ions at the anode.
a)
Cl- --> Cl + e-
b)
2Cl- --> Cl2 + 2e-
c)
Cl2 + 2e- 2Cl-
d)
Cl2 + 2e- --> 2Cl-
8.
What is the half-equation for the discharge of hydroxide ions?
a)
2O2- --> O2 + 4e-
b)
OH- --> OH + e
c)
4OH- --> 2H2O + O2 + 4e-
d)
2H2O + O2 + 4e- --> 4OH-
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