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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
Write two points of difference between the properties of phenol and ethyl alcohol.
Answer in brief.
Give the equations of the reactions for the preparation of phenol from isopropyl benezene.
The reagents used to convert phenol to 2,4,6-tribromophenol is _____________
Name the reagents used to convert phenol into
- picric acid
- p-benzoquinone
In phenols, −OH group is attached to ___________ hybridised carbon.
Phenol is obtained from cumene ____________.
Cumene is used in the commercial method for the manufacture of ____________.
The product 'C' in the following reaction is:
\[\ce{CH3CH2Br ->[alc. KCN] {'A'} ->[H3O^+][\Delta] {'B'} ->[i. LiAlH4][ii. H3O^+] {'C'}}\]
____________ will NOT undergo acetylation.
Phenoxide ion is more stable than phenol due to the ____________.
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 ____________.
Which of the following conversion explains the acidic nature of alcohols?
Which of the following alcohols is least soluble in water?
Identify 'Z' in the following series of reaction:
\[\ce{Butan - 2 - ol ->[PCl3] X ->[alco. KOH] Y ->[i) H2SO4][ii) H-OH/heat] Z}\]
Identify the reagent A used in the following conversion.
\[\ce{Phenol ->[A] Benzoquinone}\]
Which of the following on oxidation yields ethyl methyl ketone?
Which of the following alcohols is NOT prepared by reduction of carbonyl compounds?
Identify the role of PDC from the following.
Name the catalyst used in commercial method of preparation of phenol.
Amongst the following alcohols which would react fastest with cone. HCl and ZnCl2?
The product C in the following reaction is
The chemical test that distinguish between benzoic acid and phenol is ______.
The order of reactivity of hydrogen halides with ether is as follows.
The major product obtained in the following reaction is
Write the chemical reaction when hot copper is treated with Vapours of 1° (primary) alcohol.
Convert the following :
cumene to phenol.
Which of the following is primary benzylic alcohol?
Which of the following is trihydric phenol?
