MEDIUMMCQ SINGLENEET ChemistryInorganic ChemistryMetallurgyPrevious Year Questions

Blister copper is: (AIPMT 2007)

A.Impure Cu

B.Cu Alloy

C.Pure Cu

D.Copper having 1% impurity✓ Correct

Explanation

Blister copper is the purest form of copper. The sulphur impurity is removed at very high temperatures by the formation of sulphur dioxide. 2 2 2 2 2Cu S+3O 2Cu O+2SO → 2 2 2 2Cu O+Cu S 6Cu+SO → The copper formed is known as blister copper and it is 99% pure. Therefore, the correct answer is option (d) Copper having 1% impurity.

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