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Science (English Medium) Class 12 - CBSE Important Questions

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Give the structures of A, B and C in the following reactions :

Appears in 1 question paper
Chapter: [9] Amines
Concept: Preparation of Amines

Arrange the following in increasing order of basic strength :

C6H5NH2, C6H5NHCH3, C6H5N(CH3)2

Appears in 1 question paper
Chapter: [9] Amines
Concept: Physical Properties of Amines

Draw the structures of the following compounds :

 N2O5

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Chemical Reactions of Amines - Reaction with Nitrous Acid

Account for the following:
Gabriel phthalimide synthesis is not preferred for preparing aromatic primary amines.

Appears in 1 question paper
Chapter: [9] Amines
Concept: Preparation of Amines

 Account for the following: 
On reaction with benzene sulphonyl chloride, primary amine yields product soluble in alkali whereas secondary amine yields product insoluble in alkali.

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Chemical Reactions of Amines - Reaction with Arylsulphonyl Chloride

Write structures of compounds A and B in each of the following reactions: 

Appears in 1 question paper
Chapter: [9] Amines
Concept: Structure of Amines

 Write structures of compounds A and B in each of the following reactions:

Appears in 1 question paper
Chapter: [9] Amines
Concept: Preparation of Amines

Write chemical equation in support of your answer. 
 Out of  Cl and O2N Cl. which one is more reactive  towards nucleophilic substitution reaction and why?

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Chemical Reactions of Amines - Reaction with Arylsulphonyl Chloride

An aromatic compound 'A' on heating with Br2 and KOH forms a compound 'B' of molecular formula C6H7N which on reacting with CHCl3 and alcoholic KOH produces a foul-smelling compound 'C'. Write the structures and IUPAC names of compounds A, B, and C.

Appears in 1 question paper
Chapter: [9] Amines
Concept: Diazonium Salts >> Importance of Diazonium Salts in Synthesis of Aromatic Compounds

Write the equation involved in Friedal-Crafts Alkylation of Phenol 

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Chemical Reactions of Amines - Alkylation and Acylation

Write equations of the following reactions:
Acetylation of aniline

Appears in 1 question paper
Chapter: [9] Amines
Concept: Diazonium Salts >> Method of Preparation of Diazonium Salts

Write equations of the following reactions:
Coupling reaction

Appears in 1 question paper
Chapter: [9] Amines
Concept: Diazonium Salts >> Chemical Reaction of Diazonium Salts - Reactions Involving Retention of Diazo Group

Write equations of the following reactions:
Carbyl amine reaction

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Chemical Reactions of Amines - Carbylamine Reaction

Arrange the following:

In increasing order of solubility in water:

C6H5NH2, (C2H5)2NH, C2H5NH2

Appears in 1 question paper
Chapter: [9] Amines
Concept: Classification of Amines

Account for the following:

Aniline cannot be prepared by the ammonolysis of chlorobenzene under normal conditions.

Appears in 1 question paper
Chapter: [9] Amines
Concept: Preparation of Amines

Give reasons to support the answer:

3-Hydroxy pentan-2-one shows positive Tollen’s test.

Appears in 1 question paper
Chapter: [9] Amines
Concept: Diazonium Salts >> 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.

Appears in 1 question paper
Chapter: [9] Amines
Concept: Physical Properties of Amines

Account for the following:

Acylation of aniline is carried out in the presence of pyridine.

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Chemical Reactions of Amines - Basic Character of Amines

What happens when reaction:

Aniline reacts with chloroform in the presence of alcoholic potassium hydroxide

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Chemical Reactions of Amines - Carbylamine Reaction

Arrange the following in the increasing order of their boiling points:

A: Butanamine

B: N, N-Dimethylethanamine

C: N- Etthylethanaminamine

Appears in 1 question paper
Chapter: [9] Amines
Concept: Concept of Amines >> Identification of Primary, Secondary and Tertiary Amines
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