This compound forms the largest group of nonhydrocarbons in petroleum.

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Multiple Choice

This compound forms the largest group of nonhydrocarbons in petroleum.

Explanation:
Sulfur-containing compounds are the most abundant nonhydrocarbon species in petroleum. Crude oils contain sulfur in many forms—mercaptans, sulfides, disulfides, and sulfur-containing aromatics like thiophenes—which together make up the largest share of heteroatoms. Nitrogen and oxygen-containing compounds are present as well, but their total amounts are typically smaller. Halogenated hydrocarbons are relatively rare in crude oil. So, among nonhydrocarbons, sulfur compounds form the dominant group.

Sulfur-containing compounds are the most abundant nonhydrocarbon species in petroleum. Crude oils contain sulfur in many forms—mercaptans, sulfides, disulfides, and sulfur-containing aromatics like thiophenes—which together make up the largest share of heteroatoms. Nitrogen and oxygen-containing compounds are present as well, but their total amounts are typically smaller. Halogenated hydrocarbons are relatively rare in crude oil. So, among nonhydrocarbons, sulfur compounds form the dominant group.

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