JEE Main Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Main

Not in JEE Main or NEET syllabus

Statement 1: In the Hoop's process of purification of aluminium, the fused materials remain in three different layers. These layers remain intact even in electrolytic reduction.

Statement 2: All the layers have different densities.

(A)Assertion is True, Reason is True; Reason is correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

In the Hoopes electrolytic refining cell, the bottom (impure Al-Cu anode alloy), middle (molten cryolite/barium fluoride electrolyte) and top (pure Al cathode) layers stay cleanly stratified throughout electrolysis precisely because each layer has a different density and

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Question ID VK-145266