alleryStart learning →Blister copper obtained in the bessemerisation step has a blistered appearance because
Adissolved $SO_2$ escapes as the metal solidifies
Biron silicate is trapped inside it
Cit is contaminated with copper matte
Dof rapid oxidation of the surface
Answer & Solution
Correct answer: A. dissolved $SO_2$ escapes as the metal solidifies
1. In the converter, $2Cu_2O + Cu_2S \rightarrow 6Cu + SO_2$.
2. As the molten copper solidifies, the dissolved $SO_2$ gas escapes and forms blisters on the surface.
3. This gives the product its characteristic 'blister copper' texture.
_Source: Samacheer Kalvi Class 12 Chemistry Vol.1, Unit 1 'Metallurgy', §1.3.2 (extraction of copper)_
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