Chemistry, Industry and the Environment

Complete the following statement regarding industrial chemical manufacturing processes by identifying the correct categories of chemicals.

In the Solvay process for the industrial manufacture of sodium trioxocarbonate(IV), ammonia is an expensive reagent that must be recovered and reused to make the process economically viable. Which compound is reacted with ammonium chloride in the recovery tower to regenerate ammonia gas?

Match each chemical species or atmospheric component to its primary environmental function or effect regarding global warming and ozone layer preservation:

Automotive exhaust emissions significantly contribute to atmospheric pollution. Which of the following chemical reactions occurring inside a catalytic converter directly eliminates a primary pollutant that acts as a precursor to both photochemical smog and acid rain?

In the industrial refining of crude oil, catalytic cracking is widely used to convert long-chain heavy gas oil fractions into gasoline and light alkenes. Which of the following best describes the primary advantage of employing a zeolite catalyst in this process compared to thermal cracking?

Match each industrial chemical process or biotechnology application listed on the left with its corresponding catalyst or biological agent on the right.

In the industrial synthesis of ammonia via the Haber process, finely divided iron is employed as the catalyst. Which substance is added to the system as a promoter to enhance the catalytic activity of iron?

In atmospheric chemistry, certain active species initiate catalytic cycles that destroy stratospheric ozone. Which of the following species acts as a direct catalyst in the destruction of stratospheric ozone?

Photochemical smog is primarily formed during cold, humid winter mornings when atmospheric sulfur dioxide ($SO_2$) and carbon soot interact with trapped fog droplets.

Marble monuments and historical stone structures located near industrial regions often undergo rapid deterioration due to acidic rainfall. Which primary air pollutant reacts with atmospheric oxygen and water to produce tetraoxosulfate(VI) acid ($H_2SO_4$), causing this environmental degradation?

In the biological treatment of municipal and industrial wastewater via the activated sludge process, several sequential operations are performed to purify water and manage waste. Arrange the following steps of the process in the correct chronological order from first to last.

Carbon(IV) oxide ($\text{CO}_2$) drives global warming primarily by absorbing high-energy solar ultraviolet radiation in the troposphere, whereas chlorofluorocarbons ($\text{CFCs}$) destroy stratospheric ozone by absorbing long-wave infrared radiation emitted from the Earth's surface.

In water purification and industrial wastewater management, specific chemical and physical processes are used to eliminate target pollutants. Match each water treatment process on the left with its corresponding chemical function on the right.

During the municipal treatment of water for public consumption, alum, $Al_2(SO_4)_3$, is added to untreated river water. What is the primary chemical function of adding alum in this process?

Match each atmospheric chemical species or pollutant listed on the left with its corresponding atmospheric role or environmental impact listed on the right.

Agricultural runoff containing excess synthetic fertilizers frequently drains into freshwater bodies. Which of the following chemical species present in such runoff is primarily responsible for triggering rapid algal growth and subsequent dissolved oxygen depletion (eutrophication)?

Match each specific industrial effluent contaminant listed on the left with its standard chemical treatment or remediation technique on the right.

An industrial electroplating plant produces wastewater contaminated with dilute tetraoxosulfate(VI) acid ($H_2SO_4$) and toxic copper(II) ions ($Cu^{2+}$). Prior to releasing this effluent into municipal drainage, which of the following chemical treatments is most suitable to simultaneously neutralize the acidity and precipitate the heavy metal ions as an insoluble sludge?

Match each atmospheric component listed on the left with its corresponding environmental function or impact listed on the right.

Atmospheric pollutants contribute to environmental degradation through distinct chemical and physical processes. Which of the following statements correctly contrasts the mechanism of carbon(IV) oxide ($\text{CO}_2$) in global warming with that of chlorofluorocarbons ($\text{CFCs}$) in ozone layer depletion?