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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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संबंधित प्रश्न
Answer in one sentence/ word.
Write the IUPAC name of alcohol having molecular formula C4H10O which is resistant towards oxidation.
Answer in brief.
Explain why p-nitrophenol is a stronger acid than phenol.
When vapours of tert.butyl alcohol are passed over hot copper, it gives _____________
The reagents used to convert phenol to 2,4,6-tribromophenol is _____________
Draw intramolecular hydrogen bonding structure in o-nitrophenol.
What is the action of following on phenol at low temperature?
- dil. HNO3
- conc. H2SO4
- Br2/CS2
An unknown alcohol is treated with Lucas reagent. Explain how you will determine whether the alcohol is primary, secondary or tertiary. Indicate by chemical equation the reaction between isopropyl alcohol and Lucas reagent.
How will you bring about the following conversions?
isopropyl alcohol to acetone
Write the reactions for the preparation of carbolic acid from aniline.
In the Lucas test for alcohols, the appearance of turbidity is due to the formation of ____________.
Bromination of phenol, will NOT give:
The CORRECT decreasing order of boiling points for isomeric primary (1°), secondary (2°) and tertiary (3°) alcohols is ____________.
The number of isomeric alcohols possible with the formula C4H10O is ____________.
____________ will NOT undergo acetylation.
Phenoxide ion is more stable than phenol due to the ____________.
Which following reagent is used to obtain alkene from alcohol?
Which among the following compounds is used to prepare solid fuel using calcium acetate?
The number of σ bonds in carbolic acid is ______.
Identify the reagent A used in the following conversion.
\[\ce{Phenol ->[A] Benzoquinone}\]
Which of the following alcohols is NOT prepared by reduction of carbonyl compounds?
Name the catalyst used in commercial method of preparation of phenol.
What is the product formed when aniline is treated with \[\ce{NaNO2 + HCl}\] previous to hydrolysis?
Which of the following compounds reacts immediately with Lucas reagent?
Arrange O - H, C - H and N - H bonds in increasing order of their bond polarity.
What is the commercial method of preparation of phenol?
The structure of A in the given reaction is:
What is the name of isopropyl alcohol according to the carbinol system?
Which of the following is trihydric phenol?
