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Class 12thGeneral Principles & Processes of Isolating ElemenChemistryNcert Solutions Chemistry Class 12th

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

Assertion (A): Aluminuim 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:

Option 1 - <p>Both (A) and (R) are correct but (R) is not the correct explanation of (A)</p>
Option 2 - <p>Both (A) and (R) are correct and (R) is the correct explanation of (A)</p>
Option 3 - <p>(A) is true but (R) is false</p>
Option 4 - <p>(A) is false but (R) is true.</p>
1 Views|Posted 7 months ago
Asked by Shiksha User
1 Answer
R
7 months ago
Correct Option - 1
Detailed Solution:

In electrolytic reduction of Al2O3, cryolite (Na3AlF6) is used to increase conductivity & decrease melting point. Oxidation state of Al in cryolite (Na3AlF6) is (+3).

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Kindly go through the solution

 

Statement – I : Ellingham diagram explains the kinetics of reduction process.

Statement – II : Hydraulic washing, a method of concentration of ore is based on the differences in gravities of the ore and the gangue.

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Chemistry Ncert Solutions Class 12th 2023

Chemistry Ncert Solutions Class 12th 2023

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