Class name Subject Book title Chapter number Content Created at
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 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 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 5 compound indicate the relative configuration of a particular stereoisomer of a compound with respect to configuration of some other compound, confi...
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...
Class XII Chemistry Chemistry-II 4 do primary amines have higher boiling point than tertiary amines? (iii) Why are aliphatic amines stronger bases than aromatic amines? Answers to So...
Class XII Chemistry Chemistry-II 5 Unit Biomolecules Objectives After studying this Unit, you will be able to • explain the characteristics of “It is the harmonious and synchronous p...
Class XII Chemistry Chemistry-II 5 not fit in this definition. A large number of their reactions have shown that they contain specific functional groups. Chemically, the carbohydrate...
Class XII Chemistry Chemistry-II 5 and if it contains a keto group, it is known as a ketose. Number of carbon atoms constituting the monosaccharide is also introduced in the name as ...
Class XII Chemistry Chemistry-II 5 chain structure is as shown. It also exists in two cyclic forms which are obtained by the addition of —OH at C5 to the ( ) group. The ring, thus fo...
Class XII Chemistry Chemistry-II 5 of one glucose (I) is linked to C4 of another glucose unit (II). The free aldehyde group can be produced at C1 of second glucose in solution and it...
Class XII Chemistry Chemistry-II 5 the next glucose unit. (iii) Glycogen: The carbohydrates are stored in animal body as glycogen. It is also known as animal starch because its struc...
Class XII Chemistry Chemistry-II 5 The word protein is derived from Greek word, “proteios” which means primary or of prime importance. All proteins are polymers of a-amino acids. 10....
Class XII Chemistry Chemistry-II 5 S 14. Cysteine HS-CH -2 Cys C 15. Methionine* H3C-S-CH 2CH 2 Met M 16. Phenylalanine* C6H5-CH2- Phe F 17. Tyrosine (p)HO-C6H4-CH2- Tyr Y –CH 2 18. ...
Class XII Computer Science Computer Science 10 Ethernet cables, fibre optics, or Wi-Fi. A Local Area Network (LAN) is shown in Figure 10.5. Figure 10.5: A Local Area Network LAN is comparatively...
Class XII Chemistry Chemistry-II 5 10.2.3 Structure You have already read that proteins are the polymers of -amino acids of Proteins and they are connected to each other by peptide b...
Class XII Chemistry Chemistry-II 5 secondary, tertiary and quaternary, each level being more complex than the previous one. (i) Primary structure of proteins: Proteins may have one o...
Class XII Chemistry Chemistry-II 5 Fig. 10.2: -Pleated sheet structure o(iv) Quaternary structure of proteins: Some of the proteins proteins are composed of two or more polypeptide c...