Question

Match column-I with column-II and select the correct answers using the codes given below.

Column-I	Column-II
A.	Nitrous oxide	I	Secondary pollutant
B.	Chlorofluorocarbon	II.	Combustion of fossil fuels
C.	Methane	III.	Denitrification
D.	Ozone	IV.	Refrigerators
E.	Carbon dioxide	V.	Cattle, rice, field, toilets

A. A-III; B-IV; C-V; D-I; E-II
B. A-V; B-I; C-III; D-IV; E-II
C. A-IV; B-V; C-I; D-II; E-III
D. A-I; B-III; C-IV; D-V; E-II

Answer 1

Hint: The CFC is used in refrigerators mostly known as freon. We can get oxide of nitrogen (nitrous oxide) through the denitrification process. Methane is an organic compound that is released into the environment by cattle, etc. Ozone absorbs ultraviolet radiation and acts as a secondary pollutant. Carbon dioxide is produced by the burning of fossil fuels.

Complete step-by-step solution:

Denitrification is the process by which nitrates and nitrites are converted into gaseous nitrogen or into an oxide of nitrogen through the intervention of denitrifying bacteria. Nitrogen in the combined state is reduced to a gaseous state during this process. So, we can say that Nitrous Oxide will match with denitrification.
Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivatives of methane, ethane, and propane. Several chlorofluorocarbons have also been broadly used as propellants in aerosol, refrigerants, and solvent applications. Thus, CFC will match with Refrigerators.
Methane emits greenhouse gases. Methane is released into the environment through the digestion activity of methanogenic bacteria in the rumen of cattle, and rice fields, as well as the decomposition of faecal material in toilets.
Secondary pollutants are pollutants that form in the environment. Secondary pollutants are described as the pollutants which constitute the atmosphere. It is a secondary pollutant with high reactivity. When primary pollutants, such as hydrocarbons and nitrogen oxides, react with sunlight, this formation occurs. People's lungs are irked by ozone. The sun and hot temperatures both serve as stimuli in this reaction.
Carbon dioxide is produced when fossil fuels like gasoline, coal, oil and natural gas are combusted in combustion reactions. Thus, carbon dioxide will match with the combustion of fossil fuels.
Hence, the correct option is A.

Note: Ozone is classified as a secondary pollutant because it is produced indirectly through a series of processes involving two basic classes of compounds: nitrogen oxides, along with NO (nitric oxide) and NO2, and hydrocarbons. Chlorofluorocarbon is utilized for number a of purposes, yet it is damaging to the environment because it diminishes the ozone layer; thus, we should try to limit the use of Chlorofluorocarbons that has an impact on the environment.