TYBSc Chemistry Sem 6 Physical Chemistry Question Paper PDF 2026 - Mumbai University | munotes

Hours) [ Total Marks : 75
(1) All questions are compulsory
Figures to the right indicate full marks
a (3) Use of logarithm table non-programmable calculator is allowed
Attempt any three of the following
(A) Explain the theory of unimolecular reaction. 5
Inone dm? fiask, 1.88 x molecules of O, per cubic mixedwith 5
3.0 x 10'? molecules of H, per cubic meter at 300K. The average molecular
diameter of O, and H, gases is 2.9 x Calculate the number of collisions
Explain the use of viscometer in the determination of molecular weight of 5
molecules of molecular mass each 5,000
molecules of molecular mass each 7,500
molecules of molecular mass each 15,000
number average and weight average molecular weights of this sample
(E) Explain the principle and working of NMR spectrometer. 5
Explain the terms: (i Larmor Precession 5
2, Attempt any three of the following :—
Explain the use of glass electrode determination of pH of a solution. 5
4 Describe the experimental method for the determination of the decomposition 5
potential of an electrolyte
Define overvoltage. An overvoltage of 0.64V is observed during electrolysis of 5
solution using lead electrodes. What will be the new value of over
if current density is increased five times, b=0.12 V at 298 K. Calculate the
value of ‘a’ also
Explain with the help of diagram the contruction and working ofsiliconsolar 5
at is meant
for hyd rolysis chnique w is it useful to establish
) Calculate the decay constar
(F) Define and calculate if for t
and Caiculate f for
Attempt any three of the
(B) Determine the numbe
(C) Th 5
The density of NaClis 2.16% 10
used to obtain t
) State and explain the postulate
(F) meant by commutative
Find out whether A and co 5
A fast reaction is the
(i) to whose half-life varies fro
) The index of a natu
(i) Zero al polymer is ussually
(ii) greater than zero
Bakelite is an example of
4 spin of nucleus is
i) zero
(ii) integral
ta True or False :— 4
molar mass of a polymer independent of molecular
plastic can be reshaped and reused
e electron density around a proton, higher is the shielding of the
(s) energy of activated complex formed durings chemical reaction,
4 is greater than that of reactants as well as
oose the correct answer :— 4
(a) The emf of a cell is 0.6753V at 298K and 0.6915V at 973K. The temperature
4 coefficient of this
(ii) —6.48 x
(ii) 6.48 x VK"
(b) The thin glass bulb in glass electrode is filled with
(i) 0.1 saturated with AgC!
(iii) 0.1 saturated with Hg,C!,
(c) For sponteneous cell reaction
(iii) AG is and Ecell is +
(r) Threshold e
jose the correct answer : “QP Code : 03293
indices ofa Plane are
will be the Miller indices of this plane
A simple cubic crystal has
q (i) 9 Planes of symmetry
(ii) 6
q g Nction of the operator d/dx, the eigen value
(ii) 4
(iii) 4x
state whether True or False 3
(p) There are 4Na* and per unit cell of NaCl crystal
The interplanar distance ratio d,,, for simple cubic crystal is
The condition g(x)]= + 4 g(x) is fulfilled by