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Account for the following:
Aniline cannot be prepared by the ammonolysis of chlorobenzene under normal conditions.
Concept: Preparation of Amines
Give reasons to support the answer:
3-Hydroxy pentan-2-one shows positive Tollen’s test.
Concept: Chemical Reaction of Diazonium Salts - Reactions Involving Displacement of Nitrogen
Account for the following:
N-ethylethanamine boils at 329.3 K and butanamine boils at 350.8 K, although both are isomeric in nature.
Concept: Physical Properties of Amines
Account for the following:
Acylation of aniline is carried out in the presence of pyridine.
Concept: Chemical Reactions of Amines - Basic Character of Amines
What happens when reaction:
Aniline reacts with chloroform in the presence of alcoholic potassium hydroxide
Concept: Chemical Reactions of Amines - Carbylamine Reaction
Which of the following statements is not correct for amines?
Concept: Chemical Reactions of Amines - Reaction with Nitrous Acid
Give reasons for the following observation:
Aniline is acetylated before nitration reaction.
Concept: Chemical Reactions of Amines - Electrophilic Substitution
Give reasons for the following observation:
pKb of aniline is lower than the m-nitroaniline.
Concept: Chemical Reactions of Amines - Basic Character of Amines
Give reasons for the following observation:
Primary amine on treatment with benzenesulphonyl chloride forms a product which is soluble in NaOH however secondary amine gives product which is insoluble in NaOH.
Concept: Chemical Reactions of Amines - Reaction with Arylsulphonyl Chloride
Give reasons for the following observation:
Aniline does not react with methyl chloride in the presence of anhydrous AlCl3 catalyst.
Concept: Chemical Reactions of Amines - Electrophilic Substitution
A primary amine 'A' C2H7N reacts with alkyl halide (C2H5l) to give secondary amine 'B'. 'B' reacts with C6H5SO2Cl to give a solid 'C' which is insoluble in alkali. Identify 'A', 'B', 'C' and write all the chemical reaction involved.
Concept: Chemical Reactions of Amines - Reaction with Arylsulphonyl Chloride
Among the following, which is the strongest base?
Concept: Classification of Amines
When benzene diazonium chloride reacts with phenol, it forms a dye. This reaction is called ______.
Concept: Chemical Reaction of Diazonium Salts - Reactions Involving Retention of Diazo Group
Among the following, which has the highest value of pKb?
Concept: Chemical Reactions of Amines - Basic Character of Amines
Amides can be converted into amines by the reaction named ______.
Concept: Preparation of Amines
Assertion (A): Bromination of benzoic acid, gives m-bromobenzoic acid.
Reason (R): Carboxyl group increases the electron density at the meta position.
Concept: Chemical Reactions of Amines - Electrophilic Substitution
Arrange the decreasing order of pKb values.
\[\ce{C6H5NH2, C6H5NHCH3, C6H5CH2NH2, CH3NH2, NH3}\]
Concept: Chemical Reactions of Amines - Basic Character of Amines
Arrange the increasing order of solubility in water.
\[\ce{C2H5Cl, C2H5NH2, C2H5OH}\]
Concept: Classification of Amines
Arrange the decreasing boiling point.
\[\ce{CH3COOH, C2H5OH, CH3NH2, CH3OCH3}\]
Concept: Physical Properties of Amines
Write the structural difference between starch and cellulose.
Concept: Classification of Carbohydrates >> Polysaccharides
