7. Identify the reducing agent and oxidizing agent in the following reactions:
(a) 4NH3 +5O2 4NO + 6H2O
(b) Fe2O3 + 3CO2 Fe + 3CO2
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Answer:a) NH3 is reducing agent as the oxidation no of N is increasing from-3 to 2. And O2 is oxidising agent as the it's oxidation no is decreasing from 0 to -2.
b) Fe2O3 is an oxidising agent as the oxidation no of Fe is decreasing from 3 to 0.And there is no reducing agent.
Explanation:
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