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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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संबंधित प्रश्न
Give the equation of the following reaction:
Oxidation of propan-1-ol with alkaline KMnO4 solution.
Give the equation of the following reaction:
Dilute HNO3 with phenol.
When 3-methylbutan-2-ol is treated with HBr, the following reaction takes place:
\[\begin{array}{cc}
\phantom{...................................}\ce{Br}\\
\phantom{..................................}|\\
\ce{CH3 - CH - CH - CH3 ->[HBr] CH3 - C - CH2 - CH3}\\
|\phantom{.........}|\phantom{...................................}|\phantom{...........}\\
\ce{CH3}\phantom{...}\ce{OH}\phantom{...............................}\ce{CH3}\phantom{.......}\\
\end{array}\]
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.)
In the reduction \[\ce{R - CHO + H2 -> RCH2OH}\] the catalyst used is:
Which of the following is not true in case of reaction with heated copper at 300°C?
Lucas test is done to differentiate between ____________.
The compound which gives the most stable carbonium ion on dehydration is:
\[\ce{CH3CH2OH}\] can be converted into \[\ce{CH3CHO}\] by ______.
Identify the secondary alcohols from the following set:
- \[\ce{CH3CH2CH(OH)CH3}\]
- \[\ce{(C2H5)3COH}\]


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Explain why nucleophilic substitution reactions are not very common in phenols.
Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tert-butyl ether can’t be prepared by this method. Explain.
What is Lucas reagent?
The correct geometry around oxygen in CH3OCH3 is
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Write the chemical equation in support of your answer.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
Write the mechanism of acid dehydration of ethanol to yield ethene.
