Krishna University BSC Model Papers

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Krishna University B.Sc Third Year Syllabus (Chemistry)
SEM III
Paper III (INORGANIC & ORGANIC CHEMISTRY)
INORGANIC CHEMISTRY 30 hrs (2h / w)
UNIT –I
1. Chemistry of d-block elements: 9h
Characteristics of d-block elements with special reference to electronic configuration,
variable valence, magnetic properties, catalytic properties and ability to form complexes.
Stability of various oxidation states
2. Theories of bonding in metals:
6h
Metallic properties and its limitations, Valence bond theory, Free electron theory,
Explanation of thermal and electrical conductivity of metals, limitations, Band theory,
formation of bands, explanation of conductors, semiconductors and insulators.
UNIT – II
3.Metal carbonyls : 7h
EAN rule, classification of metal carbonyls, structures and shapes of metal carbonyls of
V, Cr, Mn, Fe, Co and Ni.
4. Chemistry of f-block elements: 8h
Chemistry of lanthanides - electronic structure, oxidation states, lanthanide contraction,
consequences of lanthanide contraction, magnetic properties. Chemistry of actinides -
electronic configuration, oxidation states, actinide contraction, comparison of lanthanides
and actinides.

ORGANIC CHEMISTRY 30 h (2h/w)
UNIT – III
1. Halogen compounds 5 h
Nomenclature and classification of alkyl (into primary, secondary, tertiary), aryl, aryl
alkyl, allyl, vinyl, benzyl halides.
Nucleophilic aliphatic substitution reaction- classification intoSN1
andSN2 – reaction
mechanism with examples – Ethyl chloride, t-butyl chloride and optically active alkyl
halide 2-bromobutane.

2. Hydroxy compounds 5 h
Nomenclature and classification of hydroxy compounds.
Alcohols: Preparation with hydroboration reaction, Grignard synthesis of alcohols.
Phenols: Preparation i) from diazonium salt, ii) from aryl sulphonates, iii) from cumene.
Physical properties- Hydrogen bonding (intermolecular and intramolecular). Effect of
hydrogen bonding on boiling point and solubility in water.
Identification of alcohols by oxidation with KMnO4, Ceric ammonium nitrate, Luca’s
reagent and phenols by reaction with FeCl3.
Chemical properties:
a) Dehydration of alcohols.
b) Oxidation of alcohols by CrO3, KMnO4.
c) Special reaction of phenols: Bromination, Kolbe-Schmidt reaction, Riemer-Tiemann
reaction, Fries rearrangement, azocoupling, Pinacol-Pinacolone rearrangement.
UNIT-IV
Carbonyl compounds 10 h
Nomenclature of aliphatic and aromatic carbonyl compounds, structure of the carbonyl
group. Synthesis of aldehydes from acid chlorides, synthesis of aldehydes and ketones
using 1,3-dithianes, synthesis of ketones from nitriles and from carboxylic acids.
Physical properties: Reactivity of carbonyl group in aldehydes and ketones.
Nucleophilic addition reaction with a) NaHSO3, b) HCN, c) RMgX, d) NH2OH,
e)PhNHNH2, f) 2,4 DNPH, g) Alcohols-formation of hemiacetal and acetal. Base
catalysed reactions: a) Aldol, b) Cannizzaro’s reaction, c) Perkin reaction, d) Benzoin
condensation, e) Haloform reaction, f) Knoevenagel reaction. Oxidation of aldehydesBaeyer-Villiger
oxidation of ketones.Reduction: Clemmensen reduction, Wolf-Kishner
reduction, MPV reduction, reduction with LiAlH4 and NaBH4. Analysis of aldehydes
and ketones with a) 2,4-DNPH test, b) Tollen's test, c) Fehling test, d) Schiff’s test
e) Haloform test (with equation)
UNIT-V
1. Carboxylic acids and derivatives 6 h
Nomenclature, classification and structure of carboxylic acids. Methods of preparation
by a) Hydrolysis of nitriles, amides b) Hydrolysis of esters by acids and bases with
mechanism c) Carbonation of Grignard reagents. Special methods of preparation of
aromatic acids by a) Oxidation of side chain. b) Hydrolysis by benzotrichlorides.
c) Kolbe reaction. Physical properties: Hydrogen bonding, dimeric association, aciditystrength
of acids with examples of trimethyl acetic acid and trichloroacetic acid. Relative
differences in the acidities of aromatic and aliphatic acids. Chemical properties:
Reactions involving H, OH and COOH groups- salt formation, anhydride formation, acid
chloride formation, amide formation and esterification (mechanism). Degradation of
carboxylic acids by Huns-Diecker reaction, decarboxylation by Schimdt reaction, ArndtEistert
synthesis, halogenation by Hell- Volhard- Zelinsky reaction

2. Active methylene compounds 4 h
Acetoacetic ester: keto-enol tautomerism, preparation by Claisen condensation, Acid
hydrolysis and ketonic hydrolysis. Preparation of a) monocarboxylic acids.
b) Dicarboxylic acids. c) Reaction with urea
Malonic ester: preparation from acetic acid. Synthetic applications: Preparation of
a) monocarboxylic acids (propionic acid and n-butyric acid). b) Dicarboxylic acids
(succinic acid and adipic acid) c) α,β-unsaturated carboxylic acids (crotonic acid).
d) Reaction with urea.

Krishna University B.Sc Third Year Syllabus (Chemistry)

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