To determine which gas is responsible for acid rain, let's consider the chemical processes involved in the formation of acid rain. Acid rain is primarily caused by the emission of sulfur dioxide ([tex]\(SO_2\)[/tex]) and nitrogen oxides ([tex]\(NO_x\)[/tex]) into the atmosphere. These gases react with water, oxygen, and other chemicals to form sulfuric acid and nitric acid, which then fall to the earth as acid rain.
Let's analyze the given options:
a. [tex]\(H_2\)[/tex] - Hydrogen gas is not associated with the formation of acid rain.
b. [tex]\(O_2\)[/tex] - Oxygen gas is a component of the atmosphere and is not the cause of acid rain.
c. [tex]\(CO_2\)[/tex] - Carbon dioxide can contribute to the greenhouse effect and ocean acidification, but it is not a primary cause of acid rain.
d. [tex]\(Cl_2\)[/tex] - Chlorine gas is also not responsible for acid rain.
From the list provided, none of the options correspond to the primary gases responsible for acid rain, which are sulfur dioxide ([tex]\(SO_2\)[/tex]) and nitrogen oxides ([tex]\(NO_x\)[/tex]).
Therefore, the correct answer cannot be found among the given choices. Thus, we conclude that none of the provided options answer the question accurately.
