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NEET CHEMISTRYAldehydes, Ketones and Carboxylic AcidsMedium

Question

Acetone is treated with excess ethanol in the presence of hydrochloric acid. The product obtained will be:

A

Option 1 (Image Missing)

B

Option 2 (Image Missing)

C

Option 3: 4.

D

Option 4 (Image Missing)

Step-by-Step Solution

When ketones (like acetone) are treated with alcohols (like ethanol) in the presence of dry hydrogen chloride gas (acid catalyst), they undergo nucleophilic addition.

  1. Hemiketal Formation: The first molecule of ethanol adds to the carbonyl group to form an unstable hemiketal.
  2. Ketal Formation: Since ethanol is present in excess, a second molecule of ethanol reacts with the hemiketal, eliminating a water molecule to form a stable ketal.

Reaction: (CH3)2C=O+2C2H5OH→HCl(dry)(CH3)2C(OC2H5)2+H2O(CH_3)_2C=O + 2C_2H_5OH \xrightarrow{HCl(dry)} (CH_3)_2C(OC_2H_5)_2 + H_2O

The product is 2,2-Diethoxypropane, commonly known as acetone diethyl ketal.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Aldehydes, Ketones and Carboxylic Acids. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAldehydes, Ketones and Carboxylic Acidsacetonetreatedexcessethanolpresence

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