1.
Electrolysis is the process of:
A
Producing electricity
B
Using electricity to cause chemical change
C
Neutralization reaction
D
Spontaneous reaction
2.
A battery is a device that:
A
Stores electrical energy
B
Produces heat energy
C
Consumes electricity
D
Produces light only
3.
A redox reaction is a reaction in which:
A
Only oxidation occurs
B
Only reduction occurs
C
Both oxidation and reduction occur
D
No electron transfer occurs
4.
In a Daniell cell, zinc electrode acts as:
A
Cathode
B
Anode
C
Electrolyte
D
Salt bridge
5.
In electrolysis, electrons are supplied by:
A
Electrolyte
B
Electrodes
C
External power source
D
Salt bridge
6.
The purpose of a salt bridge in a galvanic cell is to:
A
Produce electrons
B
Complete the circuit
C
Increase voltage
D
Stop oxidation
7.
Oxidation is defined as:
A
Gain of electrons
B
Loss of electrons
C
Gain of protons
D
Loss of neutrons
8.
The electrical chemical series arranges elements according to:
A
Atomic number
B
Atomic mass
C
Standard electrode potential
D
Valency
9.
In a fuel cell, the by-product formed is:
A
Carbon dioxide
B
Sulphur dioxide
C
Water
D
Nitrogen
10.
A fuel cell produces electricity by:
A
Burning fuel directly
B
Electrochemical reaction
C
Nuclear reaction
D
Photosynthesis
11.
Which of the following is an example of galvanic cell?
A
Electrolysis of water
B
Daniell cell
C
Electroplating cell
D
Fuel cell charger
12.
Which metal is most reactive according to electrochemical series?
A
Copper
B
Iron
C
Zinc
D
Potassium
13.
Halide compounds are electrolyzed mainly to obtain:
A
Acids
B
Metals and halogens
C
Bases
D
Salts
14.
An electrochemical cell converts chemical energy into:
A
Heat energy
B
Mechanical energy
C
Electrical energy
D
Nuclear energy
15.
In electroplating using the same electrode, the anode is:
A
Inert
B
The metal to be deposited
C
Plastic rod
D
Carbon rod
16.
Electroplating is used to:
A
Purify metals
B
Extract metals
C
Coat one metal with another
D
Produce electricity
17.
Hydrogen-oxygen fuel cell uses:
A
Hydrogen as oxidant
B
Oxygen as fuel
C
Hydrogen as fuel
D
Water as fuel
18.
During electrolysis, the electrode connected to positive terminal is:
A
Cathode
B
Anode
C
Salt bridge
D
Electrolyte
19.
Secondary cells are those which can be:
A
Used once
B
Recharged
C
Discarded easily
D
Used only in labs
20.
A lead-acid battery is commonly used in:
A
Watches
B
Mobile phones
C
Cars
D
Torches