JEE Main Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Main

Not in JEE Main or NEET syllabus

In order to refine blister copper, it is melted in a furnace and is stirred with green logs of wood. The purpose is

(A)To expel the dissolved gases in blister copper
(B)To bring the impurities to surface and oxidize them
(C)To increase the carbon content of copper
(D)To reduce the metallic oxide impurities with hydrocarbon gases liberated from the woodCorrect

Answer: (D)

Solution

This is the poling process: green logs of wood release hydrocarbon gases (such as methane) on heating, and these gases reduce the CuO impurity remaining in blister copper back to

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Question ID VK-145224