back to directory
NEET CHEMISTRYAlcohols, Phenols and EthersMedium

Question

The end product in the below-mentioned reaction is: H3C-Br→KCNA→H3O+B→LiAlH4, EtherC\text{H}_3\text{C-Br} \xrightarrow{\text{KCN}} \text{A} \xrightarrow{\text{H}_3\text{O}^+} \text{B} \xrightarrow{\text{LiAlH}_4\text{, Ether}} \text{C}

A

Acetone

B

Methane

C

Acetaldehyde

D

Ethyl alcohol

Step-by-Step Solution

Step 1: Methyl bromide (H3C-Br\text{H}_3\text{C-Br}) reacts with KCN\text{KCN} to undergo nucleophilic substitution (SN2S_N2), yielding methyl cyanide or acetonitrile (Compound A) as the major product. Step 2: Acetonitrile (CH3CN\text{CH}_3\text{CN}) on complete acidic hydrolysis (H3O+\text{H}_3\text{O}^+) gives acetic acid or ethanoic acid (Compound B). Step 3: Acetic acid (CH3COOH\text{CH}_3\text{COOH}) is reduced by the strong reducing agent lithium aluminium hydride (LiAlH4\text{LiAlH}_4) in the presence of ether to form ethyl alcohol or ethanol (Compound C). Thus, the final product C is ethyl alcohol.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Alcohols, Phenols and Ethers. 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.

CHEMISTRYAlcohols, Phenols and Ethersproductbelowmentionedreactiontexthtextcbrxrightarrowtextkcn

More Alcohols, Phenols and Ethers Questions

View all

When phenol is treated with CHCl₃ and NaOH, the product formed is:

A.Benzaldehyde
B.Salicylaldehyde
C.Salicylic acid
D.Benzoic acid
EasySolve

Which of the following statement is correct for the stability of ions of ethyl alcohol and phenol:

A.Delocalization of π-electrons in phenoxide ion
B.Delocalization of electrons in ethoxide ion
C.Inductive effect of ethyl and phenyl group
D.Localization of σ-electrons in phenoxide ion
MediumSolve

When glycerol is treated with an excess of HI, it produces:

A.Allyl iodide
B.Propene
C.Glycerol triiodide
D.2-Iodopropane
HardSolve

Which of the following can be used as the halide component for Friedel-Crafts reaction?

A.Chlorobenzene
B.Bromobenzene
C.Chloroethene
D.Isopropyl chloride
MediumSolve

Which of the following is not the product of dehydration of the given alcohol?

A.Option 1
B.Option 2
C.Option 3
D.Option 4
MediumSolve

The most reactive compound among the following toward electrophilic aromatic substitution reaction is:

A.Toluene
B.Benzene
C.Chlorobenzene
D.Nitrobenzene
MediumSolve

Which one of the following compounds will be most readily dehydrated?

A.Option 1
B.Option 2
C.4
D.Option 4
MediumSolve

Among the following four compounds: (a) Phenol (b) Methyl phenol (c) meta-nitrophenol (d) para-nitrophenol The acidity order is:

A.c > d > a > b
B.a > d > c > b
C.b > a > c > d
D.d > c > a > b
MediumSolve

Why 32,000+ students choose TopperSquare

Everything you need to crack NEET

15,000+ Chapter MCQs

Physics, Chemistry, Biology — chapter-wise, topic-wise practice

AI Performance Analytics

Know your weak topics. Get a personalised study plan.

Full NEET Mock Tests

180 questions, timed, with detailed score analysis

PYQ Sets 2010–2024

15 years of past papers with solved explanations

Start Practising Free

No credit card · 30-second signup · Free forever plan included

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 →

Explore more subjects:Physics MCQs•Chemistry MCQs•Biology MCQs•Botany MCQs•Zoology MCQs•NEET Mock Tests•NEET PYQs