Alkyl as a noun is any of a series of univalent radicals of the general formula cnh2n+1 derived from aliphatic hydrocarbons. while Aryl as a noun is any univalent organic radical derived from an aromatic hydrocarbon by removing a hydrogen atom.
Part of speech: noun
Definition: Any of a series of univalent radicals of the general formula CnH2n+1 derived from aliphatic hydrocarbons.
Part of speech: noun
Definition: Any univalent organic radical derived from an aromatic hydrocarbon by removing a hydrogen atom.
We hope you now know whether to use Alkyl or Aryl in your sentence.