MHTCET 19 Apr 2026 Shift 2 Paper

Concept:An aromatic aldehyde is a compound in which the $\mathrm{-CHO}$ group is directly attached to an aromatic ring, such as benzene.Explanation:We check each option to see whether the $\mathrm{-CHO}$ group is directly bonded to the benzene ring.Option A is 3-phenylpropanal, where $\mathrm{-CHO}$ is attached to an aliphatic carbon chain and not directly to the benzene ring.Option B is cinnamaldehyde, where $\mathrm{-CHO}$ is attached to an alkene side chain, so it is not directly bonded to the benzene ring.Option C is cyclohexanecarbaldehyde, where $\mathrm{-CHO}$ is attached to a cyclohexane ring, which is not aromatic.Option D is 2-methylbenzaldehyde, also called $o$-tolualdehyde, where the $\mathrm{-CHO}$ group is directly attached to the benzene ring.Therefore, the compound that satisfies the definition of an aromatic aldehyde is option D.Answer:Option D: 2-methylbenzaldehyde $\left(\mathrm{C_6H_4(CH_3)CHO}\right)$