Which of the oxide groups among the following | vedclass

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(B) Carbon is used as a reducing agent in metallurgy to reduce metal oxides to their respective metals.However,carbon cannot reduce oxides of highly r

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$CaO, K_2O$

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(B) Carbon is used as a reducing agent in metallurgy to reduce metal oxides to their respective metals.However,carbon cannot reduce oxides of highly reactive metals like $Ca$,$K$,$Na$,and $Mg$ because these metals have a much higher affinity for oxygen than carbon does.In the given options,$CaO$ and $K_2O$ are oxides of highly reactive alkaline earth and alkali metals,respectively.Therefore,they cannot be reduced by carbon.

Which of the oxide groups among the following cannot be reduced by carbon?

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