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NDA 2025 GAT · General Knowledge · Chemical Reactions · hard

In the reaction CuO + H2 gives Cu + H2O, the substance that acts as the oxidising agent is

Single correct option

In the reaction CuO + H2 gives Cu + H2O, the substance that acts as the oxidising agent is
  1. A. H2
  2. B. Cu
  3. C. H2O
  4. D. CuO
Show answer and solution

Answer: (D) CuO

CuO loses oxygen and copper goes from +2 to 0, so CuO is reduced and hence acts as the oxidising agent. Hydrogen gains oxygen to form water, so it is oxidised and acts as the reducing agent. Cu and H2O are products and not reactants, so they cannot be the oxidising agent.
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Original question written in the NDA 2025 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake