Tiêu đề DPP - 1 Solutions.pdf ✅

Class : XIIth Subject : CHEMISTRY Date : DPP No. : 1 1 (a) Hofmann bromamide reaction is used to prepare 1° amine form primary amides. In this method, amides are treated with bromine in presence of KOH. R ― CONH2 + 4KOH + Br2∆RNH2 + K2CO3 + 2KBr + 2H2O 4 (d) The amines are basic in nature due to presence of lone pair of electron on nitrogen. The 2° amines are basic among 1°,2° and 3°amines because of steric effect and hydration effect 5 (a) This is carbylamine reaction. 6 (c) p–amine forms alcohol; s–amine forms only nitrosoamine. 7 (a) CH3NH2 + C6H5SO2CI→C6H5SO2NHCH3NaOH (alkali) C6H5SO2N(Na)CH3 1° amine hinsberg’s N-methyl benzene soluble sodium salt Reagent sulphonamide 8 (d) it is a example of carbylamines reaction NH2 CH3 + CHCl3 + alc 3KOH NC CH3 p- toluidine + 3KCl + 3H2O Topic :- Amines Solutions


ANSWER-KEY Q. 1 2 3 4 5 6 7 8 9 10 A. A A A D A C A D A A Q. 11 12 13 14 15 16 17 18 19 20 A. B B A C A B D D B C