Write mechanism of the following reaction : C 2 H 5 OH → 443 K H 2 SO 4 CH 2 = CH 2 + H 2 O

Alcohols undergo dehydration (removal of a molecule of water) to form alkenes on treating with concentrated H 2 SO 4 . This is called elimination reaction. Mechanism: Step 1: Formation of protonated alcohol. Step 2: Formation of carbocation: It is the slowest step and hence, the rate determining step of the reaction. Step 3: Formation of ethene by elimination of a water molecule. The acid used in step 1 is released in step 3. To drive the equilibrium to the right, ethene is removed as it is formed.

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Oxygen-containing organic compound upon oxidation forms a carboxylic acid as the only organic product with its molecular mass higher by $14$ units. The organic compound is

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Important Questions on Alcohols, Phenols and Ethers

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

The major product in the following reaction is

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EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

Consider the following reaction,

C_{2} H_{5} O H + H_{2} S O_{4} \to P r o d u c t

Among the following, which one cannot be formed as a product under any conditions?

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

Which of the following compounds will most readily be dehydrated to give alkene under acidic condition?

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

The compound that does not undergo haloform reaction is

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

Out of t-butyl alcohol and n-butanol, which one will undergo acid catalyzed dehydration faster and why ?

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

Oxidation of 1^o alcohols to aldehydes is very successful for the alcohols like

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

The most suitable reagent for the conversion of

R - {CH}_{2} - OH \to R - CHO

is :

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

The major product of the following reaction is

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

The compound

A, C_{8} H_{10} O,

is found to react with

N a O I

(produced by reacting

Y

with

NaOH

) and yields a yellow precipitate with a characteristic smell.

A

and

Y

respectively, are

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

Which of the following compounds does NOT undergo haloform reaction?

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

The major product expected from the following reaction is:
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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

Write mechanism of the following reaction :

$C_{2} H_{5} OH \to_{443 K}^{H_{2} {SO}_{4}} {CH}_{2} = {CH}_{2} + H_{2} O$

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

An organic compound having molecular formula

C_{2} H_{6} O

undergoes oxidation with

K_{2} {Cr}_{2} O_{7} / H_{2} {SO}_{4}

to produce

X

which contains 40% carbon, 6.7% hydrogen and 53.3% oxygen. The molecular formula of the compound

X

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

Which of the following compound will give positive iodoform test?

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Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

An organic compound neither reacts with neutral ferric chloride solution nor with Fehling solution. It however, reacts with Grignard reagent and given positive iodoform test. The compound is:

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Chemical Reactions of Alcohols

The major product of the following reaction is:
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