Question

Given below are the 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 $A{l}_2{O}_3$ 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 :

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> JEE Mains 2021

Answer 1

(A) is correct - Aluminium is extracted from bauxite by electrolysis of molten mixture of $A{l}_2{O}_3$ with cryolite
$N{a}_{3}Al{F}_6:3+x-6=0x=+3$
Statement given in (R) is correct i.e, oxidation state of $Al$ in cryolite ($N{a}_{3}Al{F}_6)$ is +3 but it is not correct reason of (A)