Download SGBAU B-Tech 4th Sem Chemical Engineering Applied Physical Chemistry Question Paper

Download SGBAU (Sant Gadge Baba Amravati university) B-Tech/BE (Bachelor of Technology) 4th Sem Chemical Engineering Applied Physical Chemistry Previous Question Paper

P. Pages : 3
Time : Three Hours
B.Tech. Fourth Semester (Chemical Engineering) (CGS)
10994 : Applied Physical Chemistry : 4 CH 04
AW - 3067
WQHWMWI Max. Marks : 80
Notes :
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Answer three question from Section A and three question from Section B.
Assume suitable data wherever necessary.
Diagrams and chemical equations should be given wherever necessary.
Illustrate your answer necessary with the help of neat sketches.
Discuss the reaction, mechanism wherever necessary.
Use ofpen Blue/Black ink/re?ll only for writing the answer book.
1. a) What is conductance of an electrolyte? Explain different types of conductometric 6
titrations.
b) How will you determine pH of unknown solution for following cell, using EMF 4
measurement
Hg I IInglz. KC] ll unknown.?.?H2 [Pt
(Sal)
solution
c) The molar conductance at in?nite dilutions for sodium acetate and hydrogen chloride at 4
30? c are 91.0x104 and 426.16x1045m2moi' respectively. Also rm H+ ions in HCLtis
0.821 and for CI I3COO? ions in CH3COONa,t is 0.556. Assuming that ti = :1. Calculate
A? m for CH3 COOH.
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2. a) What are concentration cells? Derive expressions for the EMF of concentration cells. 6
i) With transference ii) W ithout transference
b) What do you mean by speci?c and equivalent conductance of an electrolytic solutions? 4
Write their interrelation.
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C) At 25?C. the degree of dissociation ((1) of pure water is 1.90x109. Calculate the molar 4
conductance (A? m ) and speci?c conductance (k) of water at this temperature. The molar
ionic conductance of 4+andOI-I? ions are 349.83x 104 and 198.50x104 Sm' mol'
respectively.
3. :1) De?ne collision parameter and derive an expression for collision number. 6
b) State law of corresponding state. 3
C) Critical constants for benzene are Tc = 560.5k and Pc = 47.5atm . Calculate the van-der 4
wall's constants.
OR
1 P.T.O

'I'
(i.
a)
b)
0)
ill
b)
c)
a)
1?)
C.)
N
L')
a)
b)
C)
A W?
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Explain critical temperature. pressure, volume and state relation between van-der-wall's
equation and critical state.
State the postulates of Kinetic theory of gases.
Find average and most probable velocity of CO: gas at 30? C?. (R = 8.3 Uk-lmoI?l)
State stark - Einstein hm ut?photochcmistry and give the examples of photochemical
reactions which Shows deviation from this law.
De?ne:-
i) Wavelength ii) Wave number iii) Chemical shift
What is the selection rule t'm' IR and NMR spectroscopy?
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Derive an expression for moment of?lnertia frequcncy ol?spcctral lines of a diatomic
molecule acts as rigid mtutur.
De?ne:
i) Electromagnetic spectrum ii) Photosensitization
iii) Phosphm?csccncc
De?ne Quantum yield of photochemical reaction. Give the reason of low quantum yield
ot?a photochemical reaction.
State and explain BE?I equation for multilayer adsorption.
Distinguish between physisorption and chemisorptinn.
hxpiuin homogcnnm catalysi: with acid - base cataiysis.
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Derive Langmuir udsm?pliun isotherm. Write the factors on which adsorption depends.
Explain the various Characteristics ot'catalyst.
Explain the folinwing with examples.
i) Catalytic poisoning ii) Auto catalysis
Derive rate equation for ?rst order reaction and write two examples. (reactions).
In ?rst order reaction. it takes the reactant 40.5 min. to be 75% decomposed. Calculate the
rate constant 01~ rcaCIinn.
W hat is Zero order reaction Explain with example.
0R
L)
6

10.
ll.
12.
a)
b)
C)
a)
b)
c)
Derive inter - relation between KP, KC and KS .
Shnw that for ?rst order reaction, the time required for 99.9% completion of the reaction
is 10 times that required for 50% completion.
What is order of reaction? Explain Pseudo - unimolecular reaction with example.
Discuss the lhcnnodynamic scale of temperature.
State ?rst law of thermodynamics with its limitations.
De?ne
i) Enthalpy
ii?) Entropy
iii) Gibb's free energy
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State the third law of thermodynamics and Explain how absolute entropy can be calculated
from this law.
Dc?nc
i) Free Energy
ii) Chemical potential
Explain the following
i) Isolated system
ii) Open system
iii) Adiabatic process
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