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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
Write the final product(s) in each of the following reactions:
Give reasons for the following:
o-nitrophenol is more acidic than o-methoxyphenol.
Give the equation of the following reaction:
Treating phenol with chloroform in the presence of aqueous NaOH.
Name the reagent used in the following reaction:
Oxidation of a primary alcohol to carboxylic 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.)
Lucas reagent is ____________.
In the reduction \[\ce{R - CHO + H2 -> RCH2OH}\] the catalyst used is:
Which of the following are used to convert RCHO into RCH2OH?
(i) H2/Pd
(ii) LiAlH4
(iii) NaBH4
(iv) Reaction with RMgX followed by hydrolysis
Which one of the following on oxidation gives a ketone?
During dehydration of alcohols to alkenes by heating with cone. H2SO4 the initial step is ____________.
The process of converting alkyl halides into alcohols involves ______.
Name the factors responsible for the solubility of alcohols in water.
Alcohols react with active metals e.g. Na, K etc. to give corresponding alkoxides. Write down the decreasing order of reactivity of sodium metal towards primary, secondary and tertiary alcohols.
What is Lucas reagent?
Which of the following observation is shown by 2-phenyl ethanol with Lucas Reagent?
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 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.
