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Explain the following (i) Chalcocite i...

Explain the following
`(i)` Chalcocite is roasted and not calcined during recovery of copper.
`(ii)` Magnesium oxide is used for lining in steel making furnace

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 oxidising agent to removing impurities of oxides

D

MgO does not react with any type of impurities

Text Solution

Verified by Experts

The correct Answer is:
B
MgO acts as a basic flux to remove impurities of Si, P and S through slag formation.
`underset("Basic flux")(MgO) + underset("Acidic impurities ")(SiO_(2)) to underset("Slag")(MgSiO_(3))`
`3MgO + P_(2)O_(5) to Mg_(3) (PO_(4))_(2)`
`MgO + SO_(2) to MgSO_(3)`
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NCERT FINGERTIPS ENGLISH-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Assertion And Reason
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