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PPSC Chemistry Part I Physical Chemistry Online Test MCQs With Answers
Question # 1
Layer of the C -atom in graphite are hold together by
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Covalent bonds
Free electrons
Ionic bond
Van Dar Waals forces
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Question # 2
For each value of l. the number of m velocity are.
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n
2
2l
(2l+1)
(n+1)
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Question # 3
Which substance has the greatest lattice energy.
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CuBr
MgO
KI
NaF
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Question # 4
Which of the following process always involve the decrease in oxidation number.
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Hydrolysis
Elecomposition
Oxidation
Reduction
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Question # 5
Any property whose magnitude is independent of the amount of substance present is called a/an
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Extensive property
Colligative property
Structural propety
Intensive property
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Question # 6
CO belong to which group.
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C
2v
D
2h
C
av
D
ah
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Question # 7
Which of the following specie is stronger acid than formic acid, HCOOH, in aqueous solution.
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CH3COOH
NH+4
H2SO-3
H4P2O7
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Question # 8
Which of the following sets of quantum number is possible for an electron in a 4f orbital.
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n = 4,l = 3, m = 4, s = +1/2
n = 4, l= 4, m = +4 , s = +1/2
n = 4, l = 3, m = +1, s = -1/2
n = 4, l = 4, m = +1 , s = -1/2
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Question # 9
Which of the following molecules belongs to C
av
point group.
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H2O
H2S
NH3
BF3
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Question # 10
A process in which no heat enters leaves the system is called.
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Isochoric
Isobaric
Adiabatic
Reveraible
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Question # 11
In terms of number of phases (p) components (C) and degree of freedom (F) the phase rule is expressed as.
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P + C = F + 2
F = P+ C - 2
P + F= C + 2
P - F = C = 2
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Question # 12
The statement that heat cannot flow spontaneously from a colder to a hotter body is the result of.
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The first law of thermodynamics
The second law of thermodynamics
The third law of thermodynamics
Henry's law
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Question # 13
Which is the correct configuration of Fe3+ (Z= 26)?
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[Ar] 4s
2
, 3d
6
[Ar] 4s
2
, 4d
5
[Ar] 3d
5
None of these
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Question # 14
Which of the following is not true for metalloids.
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They are borderline elements
They usually act as electron during with non metals.
B, Si, and Ge
They are all solids at room temperature.
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Question # 15
The number of degrees of freedom and number of components for a system of containing undissolved salt , in equilibrium with water vapor are.
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2,2
3 , 2
1 , 1
1 , 2
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Question # 16
The angle of rotation in a polarimeter depends on.
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Nature of the compound
Nature of the solvent
Wavelength of the light used
All above factors.
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Question # 17
In a standard Weaton cell the cathode is
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Cadmium amalgam
Mercury
Platinum
Carbon
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Question # 18
In C4-axis of rotation, an object in rotated through an angle of.
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120
o
180
o
100
o
90
o
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Question # 19
The internal resistance to flow possessed by a liquid is called its.
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Fluidity
Viscosity
Surface tension
Turbidity
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Question # 20
The efficiency of a reversible heat engine depends only on the
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Temperature of the heat sink
Temperature of the heat source
Temperature of the heat source and sink
Pressure of the fluid
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Question # 21
The pKa of an acid having ionization constant 1 x 10
-5
is
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-5
5
9
-9
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