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Explain why is OH group in phenols more strongly held as compared to OH group in alcohols. - Chemistry

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प्रश्न

Explain why is OH group in phenols more strongly held as compared to OH group in alcohols.

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उत्तर

In phenol, oxygen atom is attached to sp2-hybridised carbon atom while in alcohol, it is attached to sp3-hybridised carbon atom. The bond formed between oxygen and sp2-hybridised carbon is more strongly held then that formed between oxygen and sp3-hybridised carbon.

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अध्याय 11: Alcohols, Phenols and Ethers - Multiple Choice Questions (Type - I) [पृष्ठ १६०]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
अध्याय 11 Alcohols, Phenols and Ethers
Multiple Choice Questions (Type - I) | Q 41 | पृष्ठ १६०

संबंधित प्रश्न

Write the final product(s) in each of the following reactions:


Write the mechanism of the following reaction :


Show how will you synthesize pentan-1-ol using a suitable alkyl halide.


Name the reagent used in the following reaction:

Oxidation of a primary alcohol to carboxylic acid.


Name the reagent used in the following reaction:

Oxidation of a primary alcohol to aldehyde.


Name the reagent used in the following reaction:

Benzyl alcohol to benzoic acid.


When 3-methylbutan-2-ol is treated with HBr, the following reaction takes place:

\[\begin{array}{cc}
\phantom{.......................}\ce{Br}\\
\phantom{......................}|\\
\ce{CH3 - CH - CH - CH3 ->[HBr] CH3 - C - CH2 - CH3}\\
\phantom{.}|\phantom{......}|\phantom{......................}|\phantom{........}\\
\phantom{}\ce{CH3}\phantom{...}\ce{OH}\phantom{...................}\ce{CH3}\phantom{.....}
\end{array}\]

Give a mechanism for this reaction.

(Hint: The secondary carbocation formed in step II rearranges to a more

stable tertiary carbocation by a hydride ion shift from 3rd carbon atom.)


Write the mechanism (using curved arrow notation) of the following reaction :


Lucas reagent is ____________.


Cyclohexene is best prepared from cyclohexanol by which of the following:


Mark the correct increasing order of reactivity of the following compounds with HBr/HCl.

(a)
(b)
(c)

Suggest a reagent for the following conversion.


Assertion: Bond angle in ethers is slightly less than the tetrahedral angle.

Reason: There is a repulsion between the two bulky (–R) groups.


What happens when (CH3)3 C – OH is heated with Cu/573 K?

Write the chemical equation in support of your answer.


Which of the following alcohols will not undergo oxidation?


Write the mechanism of acid dehydration of ethanol to yield ethene.


Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.


Write the mechanism of acid dehydration of ethanol to yield ethene.


Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.


Write the mechanism of acid dehydration of ethanol to yield ethene. 


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