Question

Which oxide of nitrogen is called mixed acid anhydride?

Answer 1

Oxides of nitrogen

• Nitrogen oxides are a combination of gases that contain both nitrogen and oxygen.
• Nitric oxide $\left(\mathrm{NO}\right)$ and nitrogen dioxide $\left({\mathrm{NO}}_2\right)$ are two of the most toxicologically significant chemicals.
• Nitrogen monoxide or nitrous oxide, $\left({\mathrm{N}}_2\mathrm{O}\right)$ and nitrogen pentoxide $\left({\mathrm{NO}}_5\right)$ are two more gases in this category.

Nitrogen dioxide

• The term "nitrogen dioxide anhydride mixture" refers to the substance forming a mixture of two acidic anhydrides.
• It forms two nitrogen-containing oxyacids when they react with water.
• It's because when NO2 dissolves in water, it produces two acids: nitrous acid $\left({\mathrm{HNO}}_2\right)$ and nitric acid $\left({\mathrm{HNO}}_3\right)$.