Give reason for the following: Concentrated nitric acid is a stro… - Vidyadip

Question

Give reason for the following:
Concentrated nitric acid is a stronger oxidizing agent.

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Answer

Concentrated nitric acid is a stronger oxidizing agent due to nascent oxygen which it gives on decomposition.
$\begin{aligned} & \underset{\text { Conc. }}{2 HNO _3} \longrightarrow H _2 O +2 NO _2+\underset{\text { nascent oxygen }}{[ O ]} \\ & \underset{\text { Dilute }}{2 HNO _3} \longrightarrow H _2 O +2 NO +\underset{\text { nascent oxygen }}{3[ O ]}\end{aligned}$

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