General Rules of Electrolysis
Trending Questions
In the activity of electrolysis of water, how to test the obtained gases present in the test tubes?
- cathode to anode in solution
- anode to cathode through internal supply
- cathode to anode through external supply
- cathode to anode through internal supply
(a) Why distill water is a non-electrolyte?
(b) What is the electrolytic cell called?
(c) State what you would observe at the (i) cathode (ii) anode.
(d) Summarize the electrode reactions.
(e) Why is the electrolysis of acidulated water considered as an example of catalysis?
- Anions move towards anode and cations towards cathode
- In some cases, anions move to cathode and cations stay in the solution
- Anions move towards cathode and cations towards anode
- No movement of ions take place
Strong electrolytes are those which
Dissolve readily in water
Completely dissociate into ions at all dilutions
Dissociate into ions at high dilution
Conduct electricity
What happens during the electrolysis of sodium chloride? explain in detail.
What is the color of anhydrous copper sulphate?
In which of the following state sodium chloride does not conduct electricity?
- Solid state
- Aqueous Solution
- Molten state
- Sodium chloride is not conductive in any state
Which kind of chemical reaction takes place when electric current is passed through fused lead Bromide?
- P: Hydrogen; Q: Oxygen; Ratio: 1:2
- P: Oxygen; Q: Hydrogen; Ratio: 1:2
- P: Oxygen; Q: Hydrogen; Ratio: 2:1
- P: Hydrogen; Q: Oxygen; Ratio: 2:1
(a) Which ion moves towards the cathode?
(b) What is the product at the anode?
(a) The metal plate through which current enters into an electrolyte is called _________. It has _________ of electrons.
(b) The metal plate through which _________ leaves from an electrolyte is called _________. It has ________ of electrons.
(c) The ions which discharge on the negative electrode during electrolysis _________ electrons. Thus, the ions are said to be _________.
(d) The ions which discharge on the positive electrode during electrolysis __________ electrons. Thus, the ions are said to be ________.
(e) Hydrogen and metallic ions are _________ because they __________ electrons.
(f) Non-metallic ions are __________ because they _________ electrons.
Why the Aluminum is extracted through an electrolytic process and not by using a reducing agent? Write the reaction taking place at anode and cathode during the electrolytic reduction of Alumina.
Acidified water is electrolysed using platinum electrodes. Give the electrode reactions.
(b) Identify the following reactions as either oxidation or reduction:
(i) O + 2e− O2−
(ii) K − e− K+
(iii) Fe3+ + e− Fe2+
Answer in one word: Name of the metallic ions that should be present in the electrolyte when an article made of copper is to be electroplated with silver.
1. Acidified nickel sulphate solution with nickel electrode.
2. Acidulated water with inert electrode.
[2 marks]
What gases collect at the different electrodes in the electrolysis of acidulated water?
Explain why solid Sodium chloride does not pass electricity through it?
[2 Marks]
(b) Pure water consists entirely of _________ (ions/molecules).
(c) We can expect that pure water _________ (will/will not) normally conduct electricity.
- Involves the transfer of molecules
- Happens by the movement of electrons
- Happens by the movement of ions
- Does not involve the transfer of matter.
During electrolysis of an electrolyte, the number of ions produced is independent of the _______ .
temperature
nature of solvent
nature of the electrolyte
volume of the container
The process of separation of material by passing direct electric current through the solution is known as ____
Separation
Electrolysis
Segregation
Dissociation
- Anions move towards anode and cations towards cathode
- In some cases, anions move to cathode and cations stay in the solution
- Anions move towards cathode and cations towards anode
- No movement of ions take place
Define the term anode.
- water vapour
- hydrogen
- oxygen
- dilute sulphuric acid
- Oxygen
- Deuterium
- Ozone
- Hydrogen