1.

What is the starting substance fed into the electrolytic cell in Hall-Heroult process?(a) Cryolite(b) Sodium hydroxide(c) Aluminum hydroxide(d) AluminaI got this question during an online interview.This intriguing question comes from P-Block Elements topic in portion P-Block Elements of Chemistry – Class 12

Answer»

The correct choice is (d) Alumina

Explanation: Hall-Heroult process is used to extract aluminum by using an electrolytic cell. Alumina means aluminum oxide. It is dissolved in cryolite, Na3AlF6, to INCREASE electrical CONDUCTIVITY, reduce MELTING POINT and achieve greater yield of aluminum metal.



Discussion

No Comment Found

Related InterviewSolutions