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प्रश्न
Explain the following with an example.
Kolbe’s reaction.
उत्तर
Phenoxide ion generated by treating phenol with sodium hydroxide is even more reactive than phenol towards electrophilic aromatic substitution. Hence, it undergoes electrophilic substitution with carbon dioxide, a weak electrophile. Ortho hydroxybenzoic acid is formed as the main reaction product.
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संबंधित प्रश्न
Write the main products when
2, 4, 6-trinitrochlorobenzene is subjected to hydrolysis
Write the equation involved in the following reaction:
Reimer-Tiemann reaction
Give the equation of the following reaction:
Bromine in CS2 with phenol.
Name the reagent used in the following reaction:
Bromination of phenol to 2, 4, 6-tribromophenol.
Write the reaction involved in the following:
Friedal-Crafts Alkylation of Phenol
When phenol is treated with excess bromine water, it gives:
On distilling phenol with Zn dust, one gets:
In the reaction of phenol with CHCl3 and aqueous NaOH at 343 K, the electrophile attacking the ring is:
When Phenol is distilled with zinc dust, it gives:
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) \[\begin{array}{cc}
\ce{C6H5 - CH2 - CH - OH}\\
\phantom{.......}|\phantom{}\\
\phantom{.........}\ce{CH3}\phantom{}
\end{array}\]
Out of o-nitrophenol and p-nitrophenol, which is more volatile? Explain.
Convert the following:
Phenol to N-phenylethanamide.
Which of the following is not aromatic?
Write the chemical equation involved in the following reactions:
Acetylation of salicylic add
For the pair phenol and cyclohexanol, answer the following:
Give one chemical test to distinguish between the two.
Convert the following by giving a chemical equation:
Phenol to salicylaldehyde.
