In which reaction the underlined substance has been reduced?

(a) Carbon Monoxide + Copper Oxide  Carbon Dioxide + Copper

(b) Copper Oxide + Hydrochlorid Acid  Water + Copper Chloride

(c) Steam + Iron Hydrogen + Iron oxide

(d) Hydrogen+ Iron Oxide  Water + Iron

Concept Videos :-

#2 | Oxidising & Reducing Agent
#6 | Balancing of Equation by suing n Factor

Concept Questions :-

Oxidation & Reducing Agents (Oxidation No)
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