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प्रश्न
Write the reactions for the preparation of carbolic acid from aniline.
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उत्तर
Aniline is treated with nitrous acid [NaNO2 + HCl] at low temperature to obtain benzene diazonium chloride, which on hydrolysis gives carbolic acid (phenol).
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संबंधित प्रश्न
Answer in brief.
Give a simple chemical test to distinguish between ethanol and ethyl bromide.
Oxidation of ethyl alcohol using K2Cr2O7/dil H2SO4 leads to formation of _______________
What is the action of following reagents on pent-3-enal?
- H2/Ni
- LiAlH4/H3O+
How will you bring about the following conversions?
acetone to 2-methylpropan-2-ol
What is the action of conc. H2SO4 on carbolic acid at 373 K.
Phenol reacts with concentrated nitric acid in the presence of cone. H2SO4 to form ____________.
Number of oxygen atoms present in salicylaldehyde are ______.
In the Lucas test for alcohols, the appearance of turbidity is due to the formation of ____________.
α-butylene when subjected to hydroboration oxidation reaction, yields ______.
The CORRECT decreasing order of boiling points for isomeric primary (1°), secondary (2°) and tertiary (3°) alcohols is ____________.
Isobutylene on hydroboration followed by oxidation with hydrogen peroxide in presence of base yields ______.
The number of isomeric alcohols possible with the formula C4H10O is ____________.
The product 'C' in the following reaction is:
\[\ce{CH3CH2Br ->[alc. KCN] {'A'} ->[H3O^+][\Delta] {'B'} ->[i. LiAlH4][ii. H3O^+] {'C'}}\]
In Dow process, chlorobenzene is converted into phenol by ____________.
Sodium benzene sulphonate reacts with NaOH and then on acidic hydrolysis, it gives __________.
The number of moles of hydrogen gas formed when 2 moles of 2-methylpropan-2-ol reacts with aluminium is ____________.
Identify the product B in following conversion.
\[\ce{Chlorobenzene + H2O ->[Cu, 673 K][Pressure] A ->[conc. H2SO4][373 K] B}\]
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?
Identify the compound having highest boiling point from the following?
The compound which reacts fastest with Lucas reagent at room temperature is ______.
Which among the following phenolic compound is most acidic in nature?
Name the catalyst used in commercial method of preparation of phenol.
Which of the following compounds has lowest boiling point?
Which of the following compounds reacts immediately with Lucas reagent?
Arrange the following compounds in an increasing order of their solubility in water:
Write the chemical reaction when hot copper is treated with Vapours of 1° (primary) alcohol.
