An example of The substance which is composed of aromatic hydrocarbins is : Pain reliever.
Aromatic hydrocarbons
Aromatic hydrocarbons are hydrocarbons in nature are composed of 6 rings of carbn atoms ( fused benzene rings ) certain compounds like petroluem contain aromatic hydrocarbons in nature. Certain medical drugs administered are composed of aromatic hydrocarbins an example of such drugs are pain relievers.
Hence we can conclude that the substance which is composed of aromatic hydrocarbons is pain reiever.
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