Gauhati University Question Papers for Chemistry Major 1st semseter
Gauhati University Question Papers for Chemistry Major 1st semester
Question Paper from 2010 available
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Paper 101
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Paper 102
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2010
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2011
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2012
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First
Year
SEMESTER I
PAPER
M 101 Physical
Chemistry Unit
1.1 Chemical Thermodynamics
Definition
of thermodynamic terms, closed, open and isolated system; surroundings, energy,
heat, work, internal energy. The first law, calculation of work done during
expansion of gas, thermodynamic reversibility, heat capacity, enthalpy and its
significance, significance of heat and work.
State
functions and differentials; variation of internal energy and enthalpy with temperature,
Joule-Thomson experiment and liquefaction of gases; relation between Cp and CV; Calculation
of work done on adiabatic expansion; relation between P,V and T in
adiabatic processes.
Thermochemistry-
standard enthalpy changes, derivation of Hess’s law and Kirchhoff’s law.
Relation of reaction enthalpy with changes in internal energy. Calculation of
bond dissociation energies from thermochemical data.
Unit
1.2 Chemical Thermodynamics
The
second law, entropy changes in reversible and irreversible processes. Clausius
inequality, calculation of entropy changes during various processes.
Helmholtz
function and Gibb’s function and the direction of spontaneous change. Thermodynamics
of chemical reactions - Equilibrium constant of a reaction in terms of
standard Gibb’s function, dependence of equilibrium constant of temperature
and pressure.
Standard
entropy of a reaction and standard Gibbs function of formation. Maxwell’s
relations and derivation of thermodynamic equation of state; Gibb’s-Helmholtz
equation, variation of Gibb’s function with pressure and temperature.
Brief idea of partial molar quantity, chemical potential
and Gibb’s-Duhem equation.
Third law
of thermodynamics – Nernst heat theorem.
Unit
1.3 Chemical Kinetics
Concept
of reaction rate and rate laws. Order and molecularity of reaction.
Integrated rate expression for zero, first and second order reactions.
Half-life period.
Consecutive
and concurrent reaction. Steady state and rate determining step approximation.
Simple problems on Steady State approximation. Experimental determination of
rate and order of reaction. Temperature dependence of reaction rate and
Arrhenius
plots.
Kinetics
of chain reaction, H2-Br2 reaction, thermal decomposition of ethanol,
branching and non-branching chain reaction - H2 + O2 → H2O reaction.
Homogeneous catalysis, acid-base catalysis. Enzyme catalysis, Michalis-Menten
equation, effect of pH and temperature. Zeolites and its uses in cracking and
reforming of petroleum.
Internal
assessment
PAPER
M 102 Organic Chemistry
Unit
1.4 Introduction to Organic
Compounds
IUPAC nomenclature
of organic compounds. Hybridization of carbon in organic compounds. Bond
angles, bond length and bond energies. Electron delocalization effects in
organic compounds, tautomerism. Hydrogen bonding and its effect on the
properties of organic molecules. Acid-base behaviour, pKa values and
factors effecting acidity/
basicity
of organic compounds.
Unit
1.5 Stereoisomerism
Types of
steroisomerism - conformational and configurational isomers, enantiomers
& diastereomers, π-distereomers- differences in
physical and chemical properties of π- diastereomers. Syn/anti,
cis/trans & E/Z designation. Stereomutation of π-diastereomers.
Cis- trans isomerism in cycloalkanes- (upto 6- membered rings)
Enantiomers
- optical activity, asymmetry, dissymmetry or chirality, racemic modification,
& methods of resolution of racemic modification & projection
formula- Flying-wedge formula, Fischer, Newman & Sawhorse projection.
Criteria for showing optical activity, examples of optically active molecules
without chiral centre, Atropisomerism.
Unit
1.5 Organic Reaction Mechanism1
Idea of
driving force, activation energy, transition state, energy profile diagrams,
concept of kinetic and thermodynamic control of reactions, Homolytic and
heterolytic bond fission, Types of reagents-electrophiles and nucleophiles.
Types of reaction
intermediates-
carbocations carboanions, carbenes, free radicals nitrenes arynes.
Mechanism
of organic reactions
A. Addition
reactions : electrophilic, nucleophilic and free radical mechanism.
B) Substitution reactions :
electrophilic, nucleophilic and free radical mechanism
B. Elimination
reaction : β−elimination reaction - base
catalysed and pyrolytic elimination reactions.
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