Question

Dinitrogen trioxide $\left( {{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}} \right)$ is a __________while nitrogen dioxide $\left( {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right)$ is a _________.
1. Brown gas, blue solid
2. Colourless solid, brown gas
3. Colourless solid, colourless gas
4. Blue solid, brown gas

Answer 1

We know that nitrogen is used for the preparation or manufacturing of many organic and inorganic compounds. The compounds, dinitrogen trioxide and nitrogen dioxide both contain nitrogen elements. In the atmosphere the percentage of nitrogen is $80\%$.

Complete step by step solution
As we all know, both the compounds, nitrogen trioxide and nitrogen dioxide are made up of mainly nitrogen and oxygen. The atomic number of nitrogen is seven, and the atomic number of oxygen is eight. The nitrogen and oxygen both are diatomic gases. The nitrogen is colorless and occurs in both gas and liquid states. The compound of nitrogen-oxygen is coming under the category of oxides. In the dinitrogen trioxide, the oxidation state of nitrogen$+ 3$ and the oxidation state of nitrogen in the nitrogen dioxide is $+ 4$. The dinitrogen trioxide has an unpleasant odour, and it is blue in colour. The nitrogen dioxide has a strong harsh odour, and it is reddish-brown in colour.
Thus, the dinitrogen trioxide that is $\left( {{{\rm{N}}_{\rm{2}}}{{\rm{O}}_{\rm{3}}}} \right)$ is a blue solid while nitrogen dioxide that is $\left( {{\rm{N}}{{\rm{O}}_{\rm{2}}}} \right)$ brown gas.

**Hence, the correct option for this question is D that is blue solid and brown gas.

Note:**
The gas dinitrogen trioxide is generally used as rocket fuel or rocket propellant because it usually is stored as a liquid at room temperature. The nitrogen dioxide is used as a catalyst in some of the oxidation reactions. The nitrogen dioxide is usually used for manufacturing of nitric acid and sulfuric acids. Both are used as a chemical reagent in the laboratory.