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Write Kolbe’s reaction. - Chemistry

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प्रश्न

Write Kolbe’s reaction.

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उत्तर

The treatment of sodium phenoxide with carbon dioxide at 398 K under the pressure of 6 atm followed by acid-hydrolysis, salicylic acid (o-hydroxybenzoic acid) is formed. This reaction is known as Kolbe’s reaction.

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पाठ 11: Alcohols, Phenols and Ethers - Short Answer Questions (Type-Ⅰ)

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एससीईआरटी महाराष्ट्र Chemistry [English] 12 Standard HSC
पाठ 11 Alcohols, Phenols and Ethers
Short Answer Questions (Type-Ⅰ) | Q 3

संबंधित प्रश्‍न

Answer in brief.

Give the reagents and conditions necessary to prepare phenol from Benzene sulfonic acid.


Answer in brief.

Explain why p-nitrophenol is a stronger acid than phenol.


The reagents used to convert phenol to 2,4,6-tribromophenol is _____________


Write the reaction to get aspirin from salicylic acid.


With the help of chemical equations show what happens when cumene hydroperoxide is treated with dil. acid.


What is the action of following on phenol at low temperature?

  1. dil. HNO3
  2. conc. H2SO4
  3. Br2/CS2

Which of the following reagents are required in the conversion of phenol to salicylic acid?


Which of the following compounds does not react with bromine in alkaline medium?


In phenols, −OH group is attached to ___________ hybridised carbon.


Phenol is obtained from cumene ____________.


The secondary alcohol is ____________.


Which of following elements does not react with hot concentrated sulphuric acid?


The product 'C' in the following reaction is:

\[\ce{CH3CH2Br ->[alc. KCN] {'A'} ->[H3O^+][\Delta] {'B'} ->[i. LiAlH4][ii. H3O^+] {'C'}}\]


+I effect of alkyl groups in alcohols increases the stability of ____________.


____________ will NOT undergo acetylation.


Sodium benzene sulphonate reacts with NaOH and then on acidic hydrolysis, it gives __________.


Which of the following reagents is used to convert phenol to benzene?


\[\ce{Isopropyl alcohol + acidic K2Cr2O7 -> X}\]

Identify product 'X' in the above reactions.


Which isomer of C4H10O is optically active?


Which of the following alcohols is least soluble in water?


Which of the following compounds does NOT react with sodium metal?


Identify the alcohol that reacts immediately with Lucas reagent?


The compound which reacts fastest with Lucas reagent at room temperature is ______.


Identify the compound amongst the following of which 0.1 M aqueous solution has highest boiling point.


The acid, which contains both -OH and -COOR groups is ______.


What is the product formed when aniline is treated with \[\ce{NaNO2 + HCl}\] previous to hydrolysis?


Convert the following :

cumene to phenol.


What is the commercial method of preparation of phenol?


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