English
Karnataka Board PUCPUC Science 2nd PUC Class 12

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

Advertisements
Advertisements

Question

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

Short/Brief Note
Advertisements

Solution

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.

shaalaa.com
  Is there an error in this question or solution?
Chapter 11: Alcohols, Phenols and Ethers - Multiple Choice Questions (Type - I) [Page 160]

APPEARS IN

NCERT Exemplar Chemistry Exemplar [English] Class 12
Chapter 11 Alcohols, Phenols and Ethers
Multiple Choice Questions (Type - I) | Q 41 | Page 160

RELATED QUESTIONS

Give reasons for the following:

o-nitrophenol is more acidic than o-methoxyphenol.


Write the mechanism of the following reaction:


Write the mechanism of the following reaction :


Give the equation of the following reaction:

Treating phenol with chloroform in the presence of aqueous NaOH.


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


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.)


The compound which reacts fastest with Lucas reagent at room temperature is:


Which one of the following on oxidation gives a ketone?


The compound which gives the most stable carbonium ion on dehydration is:


During dehydration of alcohols to alkenes by heating with cone. H2SO4 the initial step is ____________.


Identify the secondary alcohols from the following set:

  1. \[\ce{CH3CH2CH(OH)CH3}\]
  2. \[\ce{(C2H5)3COH}\]



Name the factors responsible for the solubility of alcohols in water.


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

Write the chemical equation in support of your answer.


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.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×