Assertion (A): aluminum is extracted from bauxite by the electrolysis of molten mixture of $A l_{2} O_{3}$ with cryolite.
Reason (R): the oxidation state of “A1” in cryolite is +3. In the light of the above statement, choose the most appropriate answer from the options given below.

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(A) is true but (R) is false

Both (A) and (R) are correct and (R) is the correct explanation of (A)

(A) is false but (R) is true

Both (A) and (R) are correct but (R) is not the correct explanation of (A)

answer is B.

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Detailed Solution

Aluminum is reactive metal. So aluminum is extracted by electrolysis of alumina with molten mix true of cryolite. The oxidation state of A1 in cryolite $(N a_{3} A l F_{6})$ is +3

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