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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 \(Al_{2}O_{3}\) 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 :
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JEE Mains 2021
Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of \(Al_{2}O_{3}\) 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 :
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Solution
(A) is correct - Aluminium is extracted from bauxite by electrolysis of molten mixture of \(Al_{2}O_{3}\) with cryolite
\(Na_3AlF_6: \\3+x-6=0\\x=+3\)
Statement given in (R) is correct i.e, oxidation state of \(Al\) in cryolite (\(Na_{3}AlF_{6})\) is +3 but it is not correct reason of (A)
\(Na_3AlF_6: \\3+x-6=0\\x=+3\)
Statement given in (R) is correct i.e, oxidation state of \(Al\) in cryolite (\(Na_{3}AlF_{6})\) is +3 but it is not correct reason of (A)
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