Question

Carbon monoxide${\text{CO}}$, nitrogen dioxide${\text{N}}{{\text{O}}_{\text{2}}}$, and sulfur dioxide${\text{S}}{{\text{O}}_{\text{2}}}$, are all atmospheric pollutants.
Which reaction concerning these compounds occurs in the atmosphere?
A) ${\text{CO}}$ is spontaneously oxidised to ${\text{C}}{{\text{O}}_{\text{2}}}$
B) ${\text{N}}{{\text{O}}_{\text{2}}}$ is reduced to ${\text{NO}}$ by ${\text{CO}}$
C) ${\text{N}}{{\text{O}}_{\text{2}}}$ is reduced to ${\text{NO}}$ by ${\text{S}}{{\text{O}}_{\text{2}}}$
D) ${\text{S}}{{\text{O}}_{\text{2}}}$ is oxidised to ${\text{S}}{{\text{O}}_3}$ by ${\text{C}}{{\text{O}}_{\text{2}}}$

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. Oxygen is one of the elements in the periodic table. The symbol of oxygen is ${\text{O}}$.Oxygen is one of the sixteen groups in the periodic table. The atomic number of Oxygen is $8$. The mass number of Oxygen is $16$. The valency of Oxygen is $2$. The stable oxidation state of Oxygen is$- 2$. The atomic number of the element is nothing but the number of electrons or number of protons. The mass number of the atom is nothing but the sum of the number of protons and number of neutrons. The formula of a chemical compound having one oxygen atom and another atom is called oxide. Oxygen is dianion because the oxidation state of Oxygen is $- 2$.

Complete answer:
Given data is,
Carbon monoxide${\text{CO}}$, nitrogen dioxide ${\text{N}}{{\text{O}}_{\text{2}}}$, and sulfur dioxide ${\text{S}}{{\text{O}}_{\text{2}}}$, are all atmospheric pollutants.
${\text{N}}{{\text{O}}_{\text{2}}}$ is reduced to ${\text{NO}}$ by ${\text{S}}{{\text{O}}_{\text{2}}}$
The reaction is given below,
${\text{N}}{{\text{O}}_{\text{2}}}{\text{ + S}}{{\text{O}}_{\text{2}}} \to {\text{NO + S}}{{\text{O}}_{\text{3}}}$
According to the above discussion, we conclude is ${\text{N}}{{\text{O}}_{\text{2}}}$ reduced to ${\text{NO}}$ by ${\text{S}}{{\text{O}}_{\text{2}}}$ reaction concerning these compounds occurs in the atmosphere.

Hence, option C is the correct answer.

Note:
We have to know that the oxidation reaction means the addition of oxygen or the removal of hydrogen or the loss of electrons in the reaction from reactant to product. Compared to metal, metal oxide is highly stable in nature. The reduction reaction means the addition of hydrogen or the removal of oxygen or the gain of electrons in the reaction from reactant to product. The reduction reaction and oxidation reaction are main concepts in chemistry. If one reaction contains both oxidation reaction and reduction reaction means that reaction is called a redox reaction.