Gujarat Technological University 2010-2nd Sem B.Pharm BPharmacy -Pharm Chemistry-II - Question Paper
GUJARAT TECHNOLOGICAL UNIVERSITY
B. Pharmacy Sem-II Examination June 2010
Subject code: 220003 Subject Name: Pharm Chemistry-II
Date: 17 / 06 / 2010 Time: 02.30 pm - 05.30 pm
Total Marks: 80
Instructions: 1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1
(a) Define the term Viscosity Coefficient. Describe Ostwalds 05 viscometer method for determining it.
(b) Define: Parachor. Explain its applications in elucidating structure. 07
(c) Define: Molar Refraction. Describe Abbe Refractometer. 04
Q2
(a) State and explain Henrys Law. Enlist its limitations. 06
(b) Derive a relation for the depression of freezing point of a solution 04 with its molality.
(c) What is conductance ? Discuss Debye-Huckel theory. 06
Q.3
(a) State first law of thermodynamics. Derive the equation Cp - Cv = R 04
(b) Write a note on The Carnot Cycle. 05
(c) Explain phase rule with the meaning of the terms involved in it. 05
(d) Explain the following:
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1) Entropy 2) Joule-Thomson effect
Q.4
(a) What is an adsorption isotherm ? Discuss, in detail, Langmuir adsorption isotherm.
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(b) Differentiate between physical adsorption and chemisorption.
(c) Explain the any four characteristics of enzyme catalysis.
Q.5
(a) State & explain Lambert- Beer law of Photochemistry.
(b) Define Quantum efficiency. Discuss causes of high quantum yield with suitable examples.
(c) Explain Jablonski diagram.
(d) Explain the following:
1) Fluorescence 2) Phosphorescence 3) Thermopile
(a) Enlist various methods for determination of order of reaction. 08 Discuss any two methods.
(b) The reaction between methane and diatomic sulphur is given by the 04 following equation:
CH4(g) + 2S2(g) CS2(g)
The rate constant for this reaction at 550 C and 625 C temperatures is 1.1 lit.mol1 and 6.4 lit.mol1 respectively. Calculate Ea for the reaction. ( R = 8.3145 J. K 1 . mol1 )
(c) What is order of reaction ? Derive integrated rate equation for first 04 order reaction.
Q7
(a) Define: Radioactivity. Enlist methods for measurement of 07 radioactivity. Discuss any one in detail.
(b) Compare properties of a, P, and y radiations. 03
(c) The heat of combustion of ethanol is -330.0 kcal. If the heat of 04 formation of CO2(g) and H2O (l) be -94.3 kcal and -68.5 kcal respectively, calculate the heat of formation of ethanol.
(d) Why are high molecularity reactions rare ? - Explain. 02
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