The following sketch illustrates the process of conversion of Alumina to Aluminium:

ICSE Class 10 Chemistry PYQ · 2023 Paper · Section A

2(ii)1 Mark · 2023 · Section A · 2023 Paper

The following sketch illustrates the process of conversion of Alumina to Aluminium:

Study the diagram and answer the following:

The sketch illustrates the process of conversion of Alumina to Aluminium. Name the constituent of the electrolyte mixture which has a divalent metal in it. Name the powdered substance X sprinkled on the surface of the electrolyte mixture. ICSE 2023 Chemistry Solved Question Paper.

(a) Name the constituent of the electrolyte mixture which has a divalent metal in it.

(b) Name the powdered substance 'X' sprinkled on the surface of the electrolyte mixture.

(c) What is the name of the process?

(d) Write the reactions taking place at the electrodes 'Y' (anode) and 'Z' (cathode) respectively.

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(a) Fluorspar [CaF2]

(b) Powdered coke

(c) Hall-Heroult's process

(d) Reactions taking place at the electrodes 'Y' (anode) and 'Z' (cathode):

At anode:
6O2- - 12e- ⟶ 6[O]
3O + 3O ⟶ 3O2

At cathode:
4Al3+ + 12e- ⟶ 4Al

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