In the given reaction, ______________ acts as a reducing agent.
​$$Fe_2 O_3+3CO→2Fe+3CO_2$$​​

Correct option is B

The correct Answer is (b) CO.

we need to analyze the oxidation states of the elements involved:

• Iron (Fe) in $$Fe_2O_3$$​ has an oxidation state of +3 (since oxygen is typically -2).
• Carbon (C) in CO has an oxidation state of -2 (since oxygen is -2).

In the products:

• Iron (Fe) in the product is in the zero-oxidation state (elemental iron).
• Carbon (C) in $$CO_2$$ has an oxidation state of +4 (since oxygen is -2).

Oxidation States Change:

• Iron (Fe) is reduced from +3 in $$Fe_2O_3$$ to 0 in Fe. Therefore, iron undergoes reduction (gain of electrons).
• Carbon (C) is oxidized from -2 in CO to +4 in $$CO_2$$​Therefore, carbon undergoes oxidation (loss of electrons).
  
• The reducing agent is the substance that donates electrons, which is Carbon (C) in Carbon monoxide (CO), as it is oxidized during the reaction. Thus, CO acts as the reducing agent.​