Question

Which of the following structures are not found in aliphatic compounds?
a. aromatic rings
c. cycloalkanes
b. alkanes
d. single-bonded carbon molecules

Answer 1

The answer is A. Aromatic rings are structures not found in aliphatic compounds since they are another classification of hydrocarbons. Aliphatic compounds  are also known as non-aromatic compounds. They can be cyclic, alkanes, alkenes and alkynes

Answer 2

Answer:

$\large \boxed{\mathrm{a. \ aromatic \ rings}}$

Explanation:

Aliphatic compounds include alkanes, alenes, alkynes, straight or branched structures. Aromatic rings have a different structure that is not found in aliphatic compounds.