In which of the following reactions does HNO_ | vedclass

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(A) In the reaction $HNO_3 + H_2SO_4 	o NO_2^+ + H_3O^+ + 2HSO_4^-$,$HNO_3$ acts as a base because it accepts a proton from $H_2SO_4$. In all other o

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$HNO_3 + H_2SO_4 	o$

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(A) In the reaction $HNO_3 + H_2SO_4 	o NO_2^+ + H_3O^+ + 2HSO_4^-$,$HNO_3$ acts as a base because it accepts a proton from $H_2SO_4$. In all other options,$HNO_3$ acts as an oxidizing agent. For example,in $HNO_3 + FeSO_4 + H_2SO_4$,$Fe^{2+}$ is oxidized to $Fe^{3+}$. In $KI + HNO_3$,$I^-$ is oxidized to $I_2$. In $Au + HNO_3$,$Au$ is oxidized to $Au^{3+}$ (in aqua regia). Therefore,the correct option is $A$.

In which of the following reactions does $HNO_3$ $NOT$ act as an oxidizing agent?

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