JEE Main Chemistry question

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 the blister copper
(B)To bring the impurities to surfaces and oxidise 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 "poling" step uses hydrocarbon gases released from the green (moist) wood to reduce

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Question ID VK-147641