Question

Which of the following nitrogen compounds is known as the spirit of niter?
A) Nitrous acid
B) Nitric acid
C) Nitrosylazide
D) Nitrous oxide

Answer 1

In chemistry, periodic tables play a vital role. In the periodic table there are totally $118$ elements. In the periodic table there are totally $18$ columns and $7$ rows. The columns are called groups. Hence, $18$ groups in the periodic table. The rows are called periods. Hence, totally $7$ period in the table. The atomic number of nitrogen is $7$ and the total number of electrons is$7$and the symbol of nitrogen is ${\text{N}}$.

Complete answer:
The given nitrogen compounds are nitrous acid, nitric acid, nitrosylazide and nitrous oxide
Nitric acid is one of the nitrogen compounds known as the spirit of niter. One more name of nitric acid is aqua fortis.
The molecular formula of Nitrous acid is ${\text{HN}}{{\text{O}}_{\text{2}}}$.
The molecular formula of Nitric acid is ${\text{HN}}{{\text{O}}_{\text{3}}}$.
The molecular formula of Nitrosylazide is ${{\text{N}}_{\text{4}}}{\text{O}}$.
The molecular formula of Nitrous oxide is ${{\text{N}}_{\text{2}}}{\text{O}}$.
According to the above discussion, we conclude nitric acid is one of the nitrogen compounds known as spirit of niter.
Hence, Option A is not the correct answer, because nitric acid is one of the nitrogen compounds, but not known as spirit of niter.
Option B is the correct answer, because nitric acid is one of the nitrogen compounds known as spirit of niter.
Option C is not the correct answer, because nitric acid is one of the nitrogen compounds, but not known as spirit of niter.
Option D is not the correct answer, because nitric acid is one of the nitrogen compounds, but not known as spirit of niter.

Note:
We must have to know that the atomic number of the atom is equal to the number of protons or the number of electrons. In every atom the number of protons and the number of electrons are equal. The electrons in the atom are filled by the lower energy level to the higher energy level. In modern periodic table elements are arranged in the table depending on the atomic number. In this way only periods and rows are arranged in the modern periodic table.