question_answer

Among the following groups of oxides, the group containing oxides that cannot be reduced by carbon to give the respective metals is [NCERT 1984]

A) \[C{{u}_{2}}O,\,{{K}_{2}}O\]

B) \[F{{e}_{2}}{{O}_{3}},\,ZnO\]

C) \[CaO,\,{{K}_{2}}O\]

D) \[PbO,\,F{{e}_{3}}{{O}_{4}}\]