Question

Which liquid oxide of nitrogen is blue?
A.Nitrous oxide
B.Dinitrogen trioxide
C.Nitrogen dioxide
D.Nitrogen pentoxide

Answer 1

Oxides of nitrogen, as the name suggests is composed of nitrogen and oxygen. Low doses of oxides of nitrogen can cause irritation to our eyes, nose, throat and lungs, which can further lead to coughing, shortness of breath, tiredness and nausea. Oxides of nitrogen can be inhaled or absorbed through the skin.

Complete step by step answer:
Laughing gas is the most popular name used for Nitrous oxide, having the chemical formula ${N_2}O$. It is a colorless gas and non-flammable in nature at room temperature. But, with increasing temperatures, it can behave as a powerful oxidizer similar to that of molecular oxygen. It is a colorless, non-toxic gas, which is soluble in water. It supports combustion by releasing the oxygen radical, and has the ability to relight a glowing splint.
Dinitrogen trioxide is the chemical compound with the chemical formula ${N_2}{O_3}$.It is a deep blue colored compound. It is produced by mixing equal parts of nitric oxide ($NO$ ) and nitrogen dioxide ($N{O_2}$ ) and then cooling the mixture below $- {21^ \circ }C$ . The following chemical reaction defines its formation, $NO + N{O_2} \rightleftharpoons {N_2}{O_3}$
Nitrogen dioxide is a chemical compound having the chemical formula $N{O_2}$. It is a reddish-brown gas at higher temperatures.
Dinitrogen pentoxide is the chemical compound with the chemical formula ${N_2}{O_5}$ .It is also commonly termed as nitrogen pentoxide or nitric anhydride. It exists as colorless crystals. It melts at ${41^ \circ }C$, boils at ${47^ \circ }C$ and sublimes slightly above room temperature.

So, the correct option is B.

Note:
Some of the most common uses of nitrogen oxides are listed below-
Due to the highly combustible nature of Dinitrogen trioxide, it finds its use as a special purpose fuel. This chemical doesn't actually burn, but supports combustion. It can also be used as an oxidizer in one of the rocket propellants because of its property to get stored even as a liquid at room temperature.
Nitrous oxide finds its use in the medical field. It is used by dentists in the form of sedative and pain relief. It is often used by people to feel intoxicated or high.