CBSE 2024 · Region 1 · Set 1 · Q32 · 5 marks
Answer any five questions of the following :(a)N,N-diethyl-benzenesulphonamide is insoluble in alkali. Give reason.(b)Aniline does not undergo Friedel-Crafts reaction. Why ?(c)Write a simple chemical test to distinguish between methylamine and aniline.(d)Write the chemical reaction involved in Gabriel phthalimide synthesis.(e)How will you convert aniline to $\displaystyle p$-bromoaniline?(f)Complete the following reaction : 
(g)Write the structures of A and B in the following reaction :
Answer any five questions of the following :
(a)
N,N-diethyl-benzenesulphonamide is insoluble in alkali. Give reason.
(b)
Aniline does not undergo Friedel-Crafts reaction. Why ?
(c)
Write a simple chemical test to distinguish between methylamine and aniline.
(d)
Write the chemical reaction involved in Gabriel phthalimide synthesis.
(e)
How will you convert aniline to $\displaystyle p$-bromoaniline?
(f)
Complete the following reaction :
(g)
Write the structures of A and B in the following reaction :
Marking-scheme solution
(a)
Because N, N - diethyl-benzenesulphonamide does not contain any hydrogen atom attached to nitrogen atom, it is not acidic, hence insoluble in alkali.
(b)
Due to salt formation with aluminum chloride, the Lewis acid which is used as a catalyst.
(c)
On reacting with nitrous acid at low temperature aniline forms benzene diazonium chloride which on reacting with phenol forms orange dye whereas methylamine does not.
(d)
Phthalimide
(e)
(f)
(g)
B →
(ANY HIVE)
AminesChemical Reactions of AminesUnderstandlong_answermedium
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CBSE Class 12 Chemistry past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.