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Question
Give reason for the following:
Concentrated nitric acid is a stronger oxidizing agent.
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Solution
Concentrated nitric acid is a stronger oxidizing agent due to nascent oxygen which it gives on decomposition.
\[\ce{\underset{\text{Conc.}}{2HNO3} -> H2O + 2NO2 + \underset{\text{nascent oxygen}}{[O]}}\]
\[\ce{\underset{\text{Dilute}}{2HNO3} -> H2O + 2NO + \underset{\text{nascent oxygen}}{3[O]}}\]
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