An organic compound from components of pipe coatings and joint adhesives would most likely include which class of compounds?

An organic compound from components of pipe coatings and joint adhesives would most likely include which class of compounds?

• A. polychlorinated biphenyls
• B. acylamide
• C. polynuclear aromatic hydrocarbons
• D. polyvinyl chloride

Answer: (C)

Coatings for pipes and joint adhesives often come from bituminous materials derived from coal tar, which are rich in polycyclic aromatic hydrocarbons. These compounds are made up of two or more fused aromatic rings that form during the processing of organic matter at high temperatures. Because of this origin, an organic compound found in those components would most likely belong to the polynuclear aromatic hydrocarbons family. The other options point to different chemical groups: polychlorinated biphenyls are chlorinated aromatic hydrocarbons used for specific industrial purposes, acylamides are amide compounds, and polyvinyl chloride is a polymer. None of those best reflect the typical constituents of pipe coatings and joint adhesives compared to PAHs.

Coatings for pipes and joint adhesives often come from bituminous materials derived from coal tar, which are rich in polycyclic aromatic hydrocarbons. These compounds are made up of two or more fused aromatic rings that form during the processing of organic matter at high temperatures. Because of this origin, an organic compound found in those components would most likely belong to the polynuclear aromatic hydrocarbons family. The other options point to different chemical groups: polychlorinated biphenyls are chlorinated aromatic hydrocarbons used for specific industrial purposes, acylamides are amide compounds, and polyvinyl chloride is a polymer. None of those best reflect the typical constituents of pipe coatings and joint adhesives compared to PAHs.