Class 12 Chemistry CBSE Amines Board Questions
Here we provide Class 12 chemistry important notes,board questions and predicted questions with Answers for chapter Alcohol,Phenols and Ethers. These important notes,board questions and predicted questions are based on CBSE board curriculum and correspond to the most recent Class 12 chemistry syllabus. By practising these Class 12 materials, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 12 Board examinations as well as other entrance exams such as NEET and JEE.
2020
Q1
Arrange the following compounds as directed:
(i) In increasing order of solubility in water:
(CH3)2NH,CH3NH2,C6H5NH2
(ii) In decreasing order of basic strength in aqueous solution:
(CH3)3N,(CH3)2NH,CH3NH2
(iii) In increasing order of boiling point :
(C2H5)2NH,(C2H5)3N, C2H5NH2
solutions
(i) In increasing order of solubility in water:
(CH3)2NH,CH3NH2,C6H5NH2
(ii) In decreasing order of basic strength in aqueous solution:
(CH3)3N,(CH3)2NH,CH3NH2
(iii) In increasing order of boiling point :
(C2H5)2NH,(C2H5)3N, C2H5NH2
solutions
2018
Q1
(a) Write the reactions involved in the following:
(i) Hofmann bromamide degradation reaction
(ii) Diazotisation
(iii) Gabriel phthalimide synthesis
(b) Give reasons:
(i) (CH3)2NH is more basic than (CH3)3N in an aqueous solution
(ii) Aromatic diazonium salts are more stable than aliphatic diazonium salts
solutions
(i) Hofmann bromamide degradation reaction
(ii) Diazotisation
(iii) Gabriel phthalimide synthesis
(b) Give reasons:
(i) (CH3)2NH is more basic than (CH3)3N in an aqueous solution
(ii) Aromatic diazonium salts are more stable than aliphatic diazonium salts
solutions
OR
Q1
(a) write the structures of the main products of the following reactions:
(b) Give a simple chemical test to distinguish between Aniline and N,N-dimethylaniline
(c) Arrange the following in the increasing order of their pKb values:
C6H5NH2,C2H5NH2,C6H5NHCH3
solutions
(b) Give a simple chemical test to distinguish between Aniline and N,N-dimethylaniline
(c) Arrange the following in the increasing order of their pKb values:
C6H5NH2,C2H5NH2,C6H5NHCH3
solutions
2017
Q1
Give reasons for the following :
(a) Acetylation of aniline reduces its activation effect
(b) CH3NH2 is more basic than C6H5NH2
(c) Although-NH2 is o/p directing group,yet aniline on nitration gives a significant amount of m-nitroaniline
solutions
(a) Acetylation of aniline reduces its activation effect
(b) CH3NH2 is more basic than C6H5NH2
(c) Although-NH2 is o/p directing group,yet aniline on nitration gives a significant amount of m-nitroaniline
solutions
OR
Q1
Write the structures of compounds A,B and C in the following reactions
solutions
solutions
2016
Q1
Give reasons for the following
(i) Aniline does not undergo Friedal-Crafts reaction
(ii) (CH3)2NH is more basic (CH3)3N in an aqueous solution
(iii) Primary amines have higher boiling point than tertiary amines
solutions
(i) Aniline does not undergo Friedal-Crafts reaction
(ii) (CH3)2NH is more basic (CH3)3N in an aqueous solution
(iii) Primary amines have higher boiling point than tertiary amines
solutions
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