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NEETChemistryGeneral Principles and Processes of Isolation of Metals

Wrought iron is the purest form of iron.How can the impurities of sulfur, silicon and phosphorus be removed from cast iron?

Options

  1. ACast iron is heated to a high temperature to vaporize impurities.
  2. BCast iron is treated with strong acids to dissolve impurities.
  3. CLimestone is added as flux and sulfur, silicon and phosphorus change to their oxides and pass into the slag.
  4. DCast iron is alloyed with other metals to neutralize impurities.

Correct answer

C. Limestone is added as flux and sulfur, silicon and phosphorus change to their oxides and pass into the slag.

Step-by-step solution

Correct Option is : (C) Limestone is added as flux and sulfur, silicon and phosphorus change to their oxides and pass into the slag.

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