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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
Give the reagents and conditions necessary to prepare phenol from Chlorobenzene.
An ether (A), C5H12O, when heated with excess of hot HI produce two alkyl halides which on hydrolysis form compound (B) and (C), oxidation of (B) gave and acid (D), whereas oxidation of (C) gave a ketone (E). Deduce the structural formula of (A), (B), (C), (D), and (E).
Reaction between hot conc. HI and anisole gives ______________
What is the action of following on phenol at low temperature?
- dil. HNO3
- conc. H2SO4
- Br2/CS2
How will you bring about the following conversions?
isopropyl alcohol to acetone
How will you bring about the following conversions?
2-methyl propan-2-ol to 2-methylpropene
Phenol reacts with concentrated nitric acid in the presence of cone. H2SO4 to form ____________.
Cumene is used in the commercial method for the manufacture of ____________.
\[\ce{CH3 - CH = CH2 ->[HBr][Peroxide] A}\]
Identify A.
The product 'C' in the following reaction is:
\[\ce{CH3CH2Br ->[alc. KCN] {'A'} ->[H3O^+][\Delta] {'B'} ->[i. LiAlH4][ii. H3O^+] {'C'}}\]
\[\ce{Isopropyl alcohol + acidic K2Cr2O7 -> X}\]
Identify product 'X' in the above reactions.
Which of the following alcohols is least soluble in water?
The number of σ bonds in carbolic acid is ______.
Which of the following compounds does NOT react with sodium metal?
Identify 'Z' in the following series of reaction:
\[\ce{Butan - 2 - ol ->[PCl3] X ->[alco. KOH] Y ->[i) H2SO4][ii) H-OH/heat] Z}\]
Which of the following alcohols is NOT prepared by reduction of carbonyl compounds?
Identify the role of PDC from the following.
Ethyl alcohol can be prepared from a Grignard reagent by the reaction of ______.
The compound which reacts fastest with Lucas reagent at room temperature is ______.
Name the catalyst used in commercial method of preparation of phenol.
The acid, which contains both -OH and -COOR groups is ______.
Product (B) in this reaction is:
Which of the following compounds has lowest boiling point?
What is the product obtained in Reimer - Tiemann reaction?
What is the action of nitrous acid on aniline?
Arrange O - H, C - H and N - H bonds in increasing order of their bond polarity.
Write chemical reaction when hot copper is treated with Vapours of 3° (tertiary) alcohol.
