JEE Main Chemistry question

Not in JEE Main or NEET syllabus

In the electrolysis of alumina, cryolite is added to:

(A)Lower the melting point of alumina and to increase the electrical conductivityCorrect
(B)Minimise the anode effect
(C)Remove impurities from alumina
(D)None of the above

Answer: (A)

Solution

Cryolite is added to the Hall-Heroult cell specifically because it dissolves alumina and lowers the melting point of the mixture from over 2000°C to

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Question ID VK-145359