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The Hall-Heroult process produces around _______ pure aluminium.

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The Hall-Heroult process produces around _______ pure aluminium.

(a) 100%

(b) 20%

(c) 98%

(d) 4%

I got this question by my college professor while I was bunking the class.

This interesting question is from Chemical Processes of Aluminium in division Wrought Aluminium Alloys of Aerospace Materials & Processes

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The correct answer is (c) 98%

The explanation: The Hall-Heroult extraction process is extremely advantageous and effective. When the ore undergoes the heat treatment for the extraction of the desired metal, in the case of aluminium, 98% of pure aluminium can be obtained.

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