Question

Which one of the following oxides of nitrogen iscalled mixed anhydride ?

• A. NO
• B. $NO_2$
• C. $N_2O_4$
• D. $N_2O_5$

Answer 1

Answer: (B)

$NO_2$

Answer 2

{2NO_2 + H_2O ->HNO_3 + HNO_2 $NO_2$ is called mixed anhydride because it gives a mixture of $HNO_2$ and $HNO_3$ upon dissolution in water.