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CHM 101 CHM 101 Past Questions Objective Question

Question

Determine which element is oxidized and which is reduced in the reaction CO + H₂O → CO₂ + H₂
Options
A Carbon is reduced, oxygen is oxidized
B Carbon is reduced, hydrogen is oxidized
C Carbon is oxidized, oxygen is reduced
D Carbon is oxidized, hydrogen is reduced
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

In CO, C is +2; in CO₂, C is +4 (oxidation, loses electrons). In H₂O, H is +1; in H₂, H is 0 (reduction, gains electrons).

Hint

Assign oxidation numbers to each atom in reactants and products.

Question Info