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

M g O

acts as an acidic flux to remove impurities of

S i, P

and

S

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M g O

acts as a basic flux to remove impurities of

S i, P

and

S

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M g O

acts as an oxidising agent to remove impurities of oxides

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M g O

does not react with any type of impurities

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Solution

The correct option is A $M g O$ acts as a basic flux to remove impurities of $S i, P$ and $S$
The impurities of the furnace are acidic. So to remove them, basic fluxes are added to remove it as slag.

Example: $M g O + S i O_{2} \to M g S i O_{3}$
slag

Suggest Corrections

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