Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2026ChemistryAldehydes and KetonesActual

The compound that CANNOT be obtained from the aldol condensation reaction shown below, is

Correct answer

1

Step-by-step solution

The given reaction is an aldol condensation between 2,2-dimethylcyclopentanone and benzaldehyde in the presence of a base (NaOH) and heat. First, we identify the possible enolates. 2,2-dimethylcyclopentanone has only one enolizable -carbon (C5), as the other -carbon (C2) is blocked by two methyl groups. Thus, the enolate will form exclusively at the C5 position. Next, we consider the possible condensation products: 1. Crossed Aldol Condensation: The enolate attacks the carbonyl carbon of benzaldehyde. Subsequent de

Practice Aldehydes and Ketones on Quantrex Academy →

More from Aldehydes and Ketones

Base catalyzed aldol condensation occurs with 2026Aromatic aldehydes are less reactive than the aliphatic aldehydes in nucleophilic addition reaction this is due to 2026Identify a final product obtained when Pent-3-enenitrile is treated with AlH (i -Bu )₂ followed by acid hydrolysis. 2026When a mixture of an aldehyde and Fehling solution is boiled in hot water, a red precipitate is formed. Here the obtained red precipitate is of - 2026Which of the following reagents gives the same reduction product with propionaldehyde and acetone ? 2026Which of the following statements regarding the haloform test is NOT correct? 2026Which is the best reagent for the following conversion? CH ₃ -CH=CH-CH ₂ -CHO CH ₃ -CH=CH-CH ₂ -CH ₂ -OH 2026Aldehydes containing at least one -hydrogen atom undergo a reaction in presence of dilute aq. NaOH to form -hydroxyl aldehyde. Identify the reaction. 2026 Full Aldehydes and Ketones list All NEET PYQs