Electrolysis MCQ Questions and Answers for Practice

1. A weak electrolyte is one which

1. dissociates completely
2. is feebly ionised in the solution
3. ionises completely
4. is having high electrical conductivity

2. An electrolyte is a

1. metal
2. sugar
3. cell
4. liquid that conducts electricity

3. During electrolysis of NaCI, the gas discharged at the anode is

1. Chlorine
2. Hydrogen
3. Oxygen
4. None of these

4. During electrolysis, anions undergo

1. reduction, anode
2. oxidation, cathode
3. oxidation, anode
4. oxidation, cathode

5. During electrolysis, the electrolyte conducts electricity by the movement of

1. delocalized electrons
2. mobile cations and anions
3. electrolyte particles
4. solvent particles

6. For electrolysis to work, used compound should be a

1. insulator
2. conductor
3. metalloid
4. non conductor

7. Sodium chloride is a

1. strong electrolyte
2. weak electrolyte
3. non-electrolyte
4. None of these

8. The current flow through electrolyte is due to the movement of

1. Holes
2. Electrons
3. Ions
4. None of these

9. The electrode where the current enters the electrolyte is called the

1. electric current
2. conductor
3. anode
4. cathode

10. The material which is to be electroplated

1. can be connected to either cathode or anode
2. is freely kept in the electrolytic tank
3. is connected to the terminal of the cathode
4. is connected to the terminal of the anode

11. The negative electrode in electrolysis is called the

1. anode
2. cathode
3. gas electrode
4. None of these

12. The results of electrolysis of a blue solution using graphite electrodes. Cathode Electrode: Cathode Some reddish brown solids form. The solid does not react Anode Electrode: A gas with a choking smell evolves. The gas can turn moist blue litmus paper red and then white. The solution is probably with dilute hydrochloric aci

1. concentrated copper(II) chloride solution
2. concentrated copper(II) sulphate solution
3. concentrated sodium iodide solution
4. concentrated sodium chloride solution

13. The weak electrolyte among the following is

1. Sodium chloride solution
2. Dilute hydrochloric acid
3. Dilute sulphuric acid
4. Aqueous acetic acid

14. Water is a

1. strong electrolyte
2. weak electrolyte
3. non-electrolyte
4. None of these

15. Water is decomposed into hydrogen and oxygen by means of an electric current by the method of

1. electrolysis
2. electric heating
3. electroplating
4. None of these