Tiêu đề DPP - 3 Solutions.pdf ✅

Class : XIIth Subject : CHEMISTRY Date : DPP No. : 3 1 (b) C2H5NH2 + HNO2→C2H5OH + N2 + H2O ethyl amine ethyl alcohol (1°aliphatic amine) 1°aromatic amine ∴ Dye test is used to distinguish between 1°aliphatic and 1° aromatic amine 2 (a) Hofmann bromamide degradation takes place with complete retention of stereochemical configuration in the migrating alkyl group 3 (d) C6H5SO2Cl + RNH2→RNHSO2C6H5 KOH R ―NKSO2C6H5 Benzene sulphyonyl N-alkyl benzene soluble in KOH chloride sulphonamide 4 (b) The conversion of —CN to —CH2NH2 by catalytic reduction is called Mendius reaction. 7 (c) NH2 aniline + HNO2 0 oC phenol Topic :- Amines Solutions
C2H5NH2HNO2 ― N2 C2H5OHPCI3C2H5CINH3C2H5NH2 ethyl amine ethanol ethyl chloride ethyl amine 1. (B) (C) 8 (a) Azoxybenzene is the main product when reducing agent used is Na3AsO3/NaOH 9 (d) C6H5COCl has no reaction with carboxylic acids. 10 (d) CH3NH3Cl is acidic in nature. 13 (b) Formation of A is by diazotization and formation of B from A is by SN reaction. 14 (a) RCONH2P2O5RCN + H2O 15 (a) CH3CH2INaCNCH3CH2CNOH ―CH3CH2CONH2Br2/NaOHCH3CH2NH2 17 (c) Amines react with alkyl halide (excess) to give quaternary ammonium salt. C6H5NH2 + 3CH3I→C6H5N +(CH3 )3 I ― 19 (c) Reaction of aniline with benzaldehyde is condensation reaction. NH2 NaNO2 /HCl 278 K N2Cl benzene diazonium chloride CuCN (SN) CN benzonitrile B
H | C6H5 ― C = O + H2NC6H5CondensationC6H5CH = NC6H5 + H2O Benzaldehyde aniline benzylidene aniline
ANSWER-KEY Q. 1 2 3 4 5 6 7 8 9 10 A. B A D B A A C A D D Q. 11 12 13 14 15 16 17 18 19 20 A. B D B A A A C D C B