Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) General Single Correct MCQ
Published on: August 13, 2026

Magnesium oxide is used for the lining in steel making furnace because

A
MgO acts as an acidic flux to remove impurities of Si, P and S
B
MgO acts as a basic flux to remove impurities of Si, P and S
C
MgO acts as an oxidizing agent to remove impurities of oxides
D
MgO does not react with any type of impurities

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The correct answer is:
B

: MgO acts as a basic flux to remove impurities of Si, P and S through slag formation.

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