Question

Fuming nitric acid is,
A) $Conc.HN{O_3} + N{O_2}$
B) $Conc.HN{O_3} + N{O_3}$
C) $Conc.HN{O_3} + {N_2}{O_3}$
D) $Conc.HN{O_3} + NO$

Answer 1

We know that fuming nitric acid is generally prepared by the addition of excess nitrogen dioxide to the nitric acid. Nitric acid is commonly called aqua fortis.

Complete step by step answer:
We must remember that the fuming nitric acid is a colorless, yellowish, or brownish fuming corrosive liquid, generally produced from aqua fortis by the addition of surplus nitrogen dioxide. It is utilized in organic synthesis for nitration, and as an oxidizer in liquid propellants for rockets. We must know that white fuming aqua fortis is aqua fortis dissolved in nitrogen dioxide. Aqua fortis spontaneously produces dioxide above zero degree Centigrade. If it's inhaled even in low doses it can prove fatal causing poisoning of lungs.

Therefore, the option A is correct.

Additional Information:
We must remember that the red fuming aqua fortis may be a storable oxidizer used as a rocket fuel. It consists of $84\%$ aqua fortis $\left( {HN{O_3}} \right)$ $13\%$ of dinitrogen tetroxide and $1-2\%$ of water. The color of red fuming aqua fortis is because of the dinitrogen tetroxide, which breaks down partially to make dioxide. The dioxide dissolves until the liquid is saturated, and produces toxic fumes with a suffocating odor. It is generally used with an inhibitor because aqua fortis attacks most container materials.
It also can be a constituent of a monopropellant; with substances like amine nitrates dissolved in it, it is often used as the sole fuel during a rocket. This is often wasteful and it's not normally used this manner.

Note:
As we know that the nitrating mixture is a mixture of nitric acid and an inorganic substance like sulfuric acid, boron trifluoride as well as organic substances while fuming nitric acid is concentrated nitric acid dissolved in nitrogen oxides.