WorksheetsELECTROLYSIS
Total questions: 15
Worksheet time: 14mins
Name
Class
Date
1.
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.
2.
___________ electrode is an inert electrode.
a)
Copper
b)
Iron
c)
Carbon
d)
Zinc
3.
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
4.
Which equation shows what happen to chloride ions at the anode.
a)
Cl- --> Cl + e-
b)
2Cl- --> Cl2 + 2e-
c)
Cl2 - -> 2e- + 2Cl-
d)
Cl2 + 2e- --> 2Cl-
5.
What is electrolysis?
a)
breaking down of a compound using a current
b)
making a compound using a current
6.
What is the name given to the solution that is being electrolysed?
a)
Salt solution
b)
Electric solution
c)
Mineral solution
d)
Electrolyte
7.
Explain why the electrolyte has to be a liquid.
a)
So the ions can move
b)
So the electrons can move
c)
So that it doesn't get too hot
d)
So the fish are ok
8.
What is the removal of oxygen from a substance called?
a)
reduction
b)
extraction
c)
electrolysis
d)
oxidation
9.
What is the addition of oxygen to a substance called?
a)
decomposition
b)
reduction
c)
oxidation
d)
extraction
10.
What state must the ionic compound be in to be electrolysed?
a)
aqueous only
b)
solid only
c)
solid or aqueous only
d)
molten or aqueous only
11.
What particle carries the charge in the wire?
a)
electron
b)
proton
c)
ion
d)
atom
12.
What particle carries the charge in the electrolyte?
a)
electron
b)
proton
c)
ion
d)
atom
13.
In an aqueous solution of copper chloride, which ions are attracted to the negative electrode?
a)
Cu2+ and Cl- and H+ and OH-
b)
Cu2+ and H+
c)
Cl- and OH-
d)
Cu2+
14.
What is the product formed at the cathode during the electrolysis of molten magnesium fluoride?
a)
magnesium
b)
hydrogen
c)
fluorine
d)
oxygen
15.
What is the gas produced at the anode during the electrolysis of dilute hydrochloric acid?
a)
water
b)
oxygen
c)
hydrogen
d)
chlorine
100 %
