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प्रश्न
Explain the following with an example.
Kolbe’s reaction.
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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.
संबंधित प्रश्न
Give simple chemical tests to distinguish between the following pairs of compounds: Benzoic acid and Phenol
Write the equation involved in the following reaction:
Reimer-Tiemann reaction
Give the equation of the following reaction:
Bromine in CS2 with phenol.
When phenol is treated with excess bromine water, it gives:
When phenol is heated with CHCl3 and alcoholic KOH when salicylaldehyde is produced. This reaction is known as ____________.
When Phenol is distilled with zinc dust, it gives:
The electrophile involved in Reimer-Tiemann reaction of phenol with CHCl3 in presence of NaOH:
Which of the following species can act as the strongest base?
Phenol does not undergo nucleophilic substitution reaction easily due to ______.
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) \[\begin{array}{cc}
\ce{C6H5 - CH2 - CH - OH}\\
\phantom{.......}|\phantom{}\\
\phantom{.........}\ce{CH3}\phantom{}
\end{array}\]
Convert the following:
Phenol to N-phenylethanamide.
Attacking species in nitration of benzene in presence of fuming HNO3 is
Write the equations for the following reaction:
Phenol is treated with chloroform in the presence of NaOH
For the pair phenol and cyclohexanol, answer the following:
Give one chemical test to distinguish between the two.
