CBSE 12th Standard Chemistry Subject Amines Ncert Exemplar 2 Mark Questions 2021
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CBSE 12th Standard Chemistry Subject Amines Ncert Exemplar 2 Mark Questions 2021
12th Standard CBSE
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Reg.No. :
Chemistry
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What is the rol of HNO3 in the nitrating mixture used for nitration of benzene?
(a) -
Why is NH2 group of aniline acetylated before carrying out nitration?
(a) -
What is the product when C6H5CH2NH2 reacts with NHO2?
(a) -
What is the best reagent to convert nitrile to primary amine?
(a) -
What is Hinsberg reagent?
(a)
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CBSE 12th Standard Chemistry Subject Amines Ncert Exemplar 2 Mark Questions 2021 Answer Keys
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HNO acts as a base in the nitrating mixture (conc.HNO3+conc.H2SO4). H2SO4 acts on HNO3 to generate the electrophile, \({ NO }_{ 2 }^{ + }\) (nitronium ion)
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It is because it will get oxidised with nitric acid if it is not acetylated.
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When benzylamine is treated with HNO2, benzyldiazonium chloride is first formed whivh being unstable decomposes to form benzyl alcohol.
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Reduction of nitriles with Na / C2H5OH or LiAlH4 gives primary amines
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Benzenesulphonyl chloride (C6H5SO2CI) is called Hinsberg's reagent.
