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Byju's Answer
Standard XII
Chemistry
Oxyacids of Phosphorus
Sodium phenox...
Question
Sodium phenoxide reacts with
C
O
2
at
400
K
and
4
−
7
atm pressure to give:
A
Sodium salicylate
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B
Salicylaldehyde
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C
Catechol
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D
Benzoic acid
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Solution
The correct option is
A
Sodium salicylate
This reaction is termed as Kolbe's reaction
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Phenol reacts with sodium hydroxide to give sodium phenoxide. Phenoxide ion undergoes electrophilic substitution with carbon dioxide ( a weak electrophile) because phenoxide ion is more reactive than phenol. Salicylic acid is formed as a major product. At lower temperature ortho isomer predominant, whereas para isomer is obtained at a higher temperature. Give the reason behind it.
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Standard XII Chemistry
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