JEE Main Chemistry question

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

Not in JEE Main or NEET syllabus

Among the following groups of oxides, the group containing oxides that cannot be reduced by carbon to give the respective metals is

(A)
(B)
(C)
(D)Correct

Answer: (D)

Solution

CaO and are oxides of highly electropositive metals (Ca and K); carbon cannot reduce either of them to the free metal under practical conditions, since these metals would simply form carbides or the reaction is thermodynamically

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Question ID VK-145299