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प्रश्न
Give simple chemical tests to distinguish between the following pairs of compounds: Benzoic acid and Phenol
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उत्तर १
(ii) Distinguish test between Benzoic acid and Phenol:
NaHCO3 Test: When Benzoic acid reacts with NaHCO3, brisk effervescence of CO2 gas evolved.
Phenol does not give this test.
C6H5OH + NaHCO3 → No Reaction.
उत्तर २
Benzoic acid and Phenol : Benzoic acid and phenol can be distinguish by FeCl3 tests. Both reacts with FeCl3 to give different colours. Phenol reacts with FeCl3 to give violet coloured precipitate while benzoic acid give buff coloured precipitate.
उत्तर ३
When treated with sodium bicarbonate, benzoic acid gives brisk effervescence due to evolution of carbon dioxide gas. No reaction takes place when phenol is treated with NaHCO3.
C6H5COOH + NaHCO3 → C6H5COONa + H2O + CO2
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संबंधित प्रश्न
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?
Which of the following are used to convert \[\ce{RCHO}\] into \[\ce{RCH2OH}\]?
(i) \[\ce{H2/Pd}\]
(ii) \[\ce{LiAlH4}\]
(iii) \[\ce{NaBH4}\]
(iv) Reaction with \[\ce{RMgX}\] followed by hydrolysis
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.
Nitration is an example of aromatic electrophilic substitution and its rate depends upon the group already present in the benzene ring. Out of benzene and phenol, which one is more easily nitrated and why?
Attacking species in nitration of benzene in presence of fuming HNO3 is
Why ortho-nitrophenol is steam volatile while para-nitrophenol is not?
