Home Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) General Which one of the following metals cannot be …
Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) General Single Correct MCQ
Published on: August 12, 2026

Which one of the following metals cannot be extracted by carbon reduction ?

A
Pb
B
Fe
C
Zn
D
Al.

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Text Solution

Verified by Experts
The correct answer is:
D

Electrolytic reduction method is used in the extraction of highly electropositive elements as they themselves are stronger reducing agents. They lie above hydrogen in electrochemical series. The heat of formation of Al 2 O 3 is very high and therefore, at higher temperature there will be the possibility of formation of Al 4 C 3 with carbon.

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