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प्रश्न
Why ortho-nitrophenol is steam volatile while para-nitrophenol is not?
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उत्तर
In o-nitrophenol, oxygen in the NO2 group forms an intramolecular hydrogen bond with hydrogen in the hydroxide group. While in the p-nitrophenol, oxygen in the NO2 group of one molecule forms an intermolecular hydrogen bond with hydrogen in the hydroxide group of another molecule.
Since intramolecular hydrogen bonds are weaker than intermolecular hydrogen bonds, o-nitrophenol is less steam volatile than p-nitrophenol.
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संबंधित प्रश्न
Write the equation involved in the following reaction:
Reimer-Tiemann reaction
Write the equation involved in the following reaction:
Kolbe’s reaction
While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile. Give reason.
Give the equation of the following reaction:
Bromine in CS2 with phenol.
Picric acid is ____________.
When phenol is heated with CHCl3 and alcoholic KOH when salicylaldehyde is produced. This reaction is known as ____________.
Which of the following are benzylic alcohols?
(i) \[\ce{C6H5 - CH2 - CH2OH}\]
(ii) \[\ce{C6H5 - CH2OH}\]
(iii) \[\begin{array}{cc}
\ce{C6H5 - CH - OH}\\
\phantom{}|\phantom{.}\\
\phantom{..}\ce{CH3}\phantom{}
\end{array}\]
(iv) \[\begin{array}{cc}
\ce{C6H5 - CH2 - CH - OH}\\
\phantom{.......}|\phantom{}\\
\phantom{.........}\ce{CH3}\phantom{}
\end{array}\]
Attacking species in nitration of benzene in presence of fuming HNO3 is
Which of the following reacts with phenol to give salicylaldehyde after hydrolysis?
Convert the following by giving a chemical equation:
Phenol to salicylaldehyde.
