Class name Subject Book title Chapter number Content Created at
Class XII Chemistry Chemistry-II 3 (i) Cyanohydrin (ii) Acetal (iii) Semicarbazone (iv) Aldol (v) Hemiacetal (vi) Oxime (vii) Ketal (vii) Imine (ix) 2,4-DNP-derivative (x) Schiff’s b...
Class XII Chemistry Chemistry-II 3 nucleophile and which as electrophile. 8.10 An organic compound with the molecular formula C H9O10orms 2,4-DNP derivative, reduces Tollens’ reagent...
Class XII Chemistry Chemistry-II 3 material, reagent or products 8.18 Give plausible explanation for each of the following: (i) Cyclohexanone forms cyanohydrin in good yield but 2,2,...
Class XII Chemistry Chemistry-II 4 Unit Objectives Amines After studying this Unit, you will be able to describe amines as derivatives of “The chief commercial use of amines is as in...
Class XII Chemistry Chemistry-II 4 amines. The fourth orbital of nitrogen in all amines contains an unshared pair of electrons. Due to the presence of unshared pair of electrons, the...
Class XII Chemistry Chemistry-II 4 2roups and suitable prefix such as di, tri, etc. is attached to the amine. The letter ‘e’ of the suffix of the hydrocarbon part is retained. For ex...
Class XII Chemistry Chemistry-II 4 presence of finely divided nickel, palladium or platinum and also by reduction with metals in acidic medium. Nitroalkanes can also be similarly red...
Class XII Chemistry Chemistry-II 4 produce primary amines. This reaction is used for ascent of amine series, i.e., for preparation of amines containing one carbon atom more than the ...
Class XII Chemistry Chemistry-II 4 N-dimethylaniline (iii) Cl–(C2 4 –Cl into hexan-1,6-diamine? The lower aliphatic amines are gases with fishy odour. Primary amines 9.5 Physical wit...
Class XII Chemistry Chemistry-II 4 Alkanes of Similar Molecular Masses Sl. No. Compound Molar mass b.p./K 1. n-C 4 9H 2 73 350.8 2. (C2H 5 2H 73 329.3 3. C 2 5(CH )3 2 73 310.5 4. C ...
Class XII Computer Science Computer Science 4 from where queue was joined) current booth and join Activity 4.3 queue at the vacant booth. In a deque, if insertion and deletion of Following are ...
Class XII Chemistry Chemistry-II 4  3  b R  NH 2 pK b –log K b Larger the value of K ob smaller the value of pK , strbnger is the base. The pK values of few amines are given i...
Class XII Chemistry Chemistry-II 4 of the acid. Moreover, the substituted ammonium ion formed from the amine gets stabilised due to dispersal of the positive charge by the +I effect ...
Class XII Chemistry Chemistry-II 4 decides the basic strength of alkyl amines in the aqueous state. The order of basic strength in case of methyl substituted amines and ethyl substit...
Class XII Chemistry Chemistry-II 4 C H NH 2 5 2 2 5 2 3 6 5 2 2. Alkylation Amines undergo alkylation on reaction with alkyl halides (refer Unit 6, Class XII). 3. Acylation Aliphatic...
Class XII Chemistry Chemistry-II 4 with nitrous acid at low temperatures (273-278 K) to form diazonium salts, a very important class of compounds used for synthesis of a variety of a...
Class XII Chemistry Chemistry-II 4 of aromatic amines is that of their very high reactivity. Substitution tends to occur at ortho- and para-positions. If we have to prepare monosubst...
Class XII Chemistry Chemistry-II 4 , C2H N6 , 5H , 2 H CH 3H a6d (5 H )2NH 2 2 5 2 (ii) C H NH , (C H ) NH, (C H ) N, C H NH 2 5 2 2 5 2 2 5 3 6 5 2 (iii) CH NH , (CH ) NH, (CH ) N, ...
Class XII Chemistry Chemistry-II 4 a short time in solution at low temperatures (273-278 K). The stability of arenediazonium ion is explained on the basis of resonance. Benzenediazon...
Class XII Chemistry Chemistry-II 4 halogen acid in the presence of copper powder. This is referred as Gatterman reaction. The yield in Sandmeyer reaction is found to be better than G...
Class XII Chemistry Chemistry-II 5 -form (m.p. 423 K) is obtained by crystallisation from hot and saturated aqueous solution at 371 K. This behaviour could not be explained by the op...
Class XII Chemistry Chemistry-II 4 be prepared by direct halogenation. Synthesis The cyano group cannot be introduced by nucleophilic substitution of of Aromatic chlorine in chlorobe...
Class XII Chemistry Chemistry-II 4 electrons on nitrogen. Influence of the number of hydrogen atoms at nitrogen atom on the type of reactions and nature of products is responsible fo...
Class XII Chemistry Chemistry-II 4 undergo Friedel-Crafts reaction. (vi) Diazonium salts of aromatic amines are more stable than those of aliphatic amines. (vii) Gabriel phthalimide ...
Class XII Chemistry Chemistry-II 4 to toluene (ix) Aniline to benzyl alcohol. 9.9 Give the structures of A, B and C in the following reactions: NaCN OH NaOH Br (i) CH 3H I2   A...