Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).…

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of Al2O3 with cryolite.
Reason (R) : The oxidation state of Al in cryolite is +3.
In the light of the above statements, choose the most appropriate answer from the options given below :
  1. Both (A) and (R) are correct and (R) is the correct explanation of (A).
  2. (A) is true but (R) is false.
  3. Both (A) and (R) are correct but (R) is not the correct explanation of (A).
  4. (A) is false but (R) is true.

Solution

In electrolytic reduction of Al2O3 we use cryolite to increase conductivity and decrease melting point. Cryolyte is Na3AIF6, Oxidation number of Al is +3

Asked in: JEE Main 2021 (31 Aug Shift 1)

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