back to directory
NEET CHEMISTRYAldehydes, Ketones and Carboxylic AcidsEasy

Question

The hydrolyzed product of an ester, when reduced by LiAlH4LiAlH_4, gives:

A

Two alcohols

B

Two aldehydes

C

One acid and one alcohol

D

Two acids

Step-by-Step Solution

The reaction proceeds in two conceptual steps based on the question wording:

  1. Hydrolysis of Ester: Esters (RCOORRCOOR') undergo hydrolysis to form a carboxylic acid (RCOOHRCOOH) and an alcohol (ROHR'OH) [1, 2].
  2. Reduction by LiAlH4LiAlH_4: Lithium aluminium hydride (LiAlH4LiAlH_4) is a strong reducing agent. It reduces carboxylic acids (RCOOHRCOOH) to primary alcohols (RCH2OHRCH_2OH). The alcohol (ROHR'OH) produced in the first step remains an alcohol.

Alternatively, direct reduction of an ester by LiAlH4LiAlH_4 also cleaves the ester bond to yield two alcohols: one corresponding to the acyl group (reduced to a primary alcohol) and one corresponding to the alkoxy group. In either interpretation, the final product mixture consists of two alcohols.

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 Acidshydrolyzedproductreduced

More Aldehydes, Ketones and Carboxylic Acids Questions

View all

The product formed from the following reaction sequence is:

A.Data Missing
B.Data Missing
C.Data Missing
D.Data Missing
MediumSolve

Which of the chemical reagents can be used to distinguish between cis-cyclopenta-1,2-diol and trans-cyclopenta-1,2-diol?

A.Ozone
B.MnO₂
C.Aluminium isopropoxide
D.Acetone
HardSolve

The product(s) formed from the following reaction is/are:

A.RCOOH only
B.$RCH_2COOH$ only
C.Data Missing
D.RCOOH and $RCH_2COOH$
MediumSolve

The intermediate compound 'X' in the following chemical reaction is: $$\text{Toluene} \xrightarrow{CrO_2Cl_2/CS_2} X \xrightarrow{H_3O^+} \text{Benzaldehyde}$$

A.$$C_6H_5-CH_2Cl$$
B.$$C_6H_5-CHCl_2$$
C.$$C_6H_5-CH(OH)_2$$
D.$$C_6H_5-CH(OCrOHCl_2)_2$$
MediumSolve

The product that cannot be formed in the following reaction is:

A.Data Missing
B.Data Missing
C.4
D.Data Missing
MediumSolve

The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon is:

A.A carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equilibration.
B.A carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation.
C.A carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as keto-enol tautomerism.
D.A carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol.
EasySolve

The product of the below-mentioned reaction is: (Reaction Scheme Missing)

A.Option 1 (Image Missing)
B.Option 2 (Image Missing)
C.Option 3 (Image Missing)
D.Option 4 (Image Missing)
MediumSolve

$$RMgX + CO_2 \xrightarrow{\text{dry ether}} Y \xrightarrow{H_3O^+} RCOOH$$ What is Y in the above reaction?

A.$(RCOO)_2Mg$
B.$RCOO^-Mg^+X$
C.$R_3CO^-Mg^+X$
D.$RCOO^-X^+$
MediumSolve

This neet chemistry practice question is part of the TopperSquare free question bank. TopperSquare offers 15,000+ chapter-wise NEET MCQs across Physics, Chemistry, and Biology with detailed step-by-step explanations, full mock tests, NEET PYQs (2010–2024), and an AI-powered performance analytics dashboard. browse all neet practice questions → · practice chemistry sets →