Impurities of sulphur, silicon and phosphorus can be remove…

Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) General Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

Impurities of sulphur, silicon and phosphorus can be removed from cast iron by adding

Carbon which reduces the impurities

Water which dissolves the impurities

Limestone which changes impurities into oxides and pass into slag

Iron oxide which reacts with impurities by forming slag.

Text Solution

Verified by Experts

The correct answer is:

: Limestone is added as flux and S, Si and P change to their oxides and pass into the slag.

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