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PPSC Chemistry Part I Physical Chemistry Online Test MCQs With Answers
Question # 1
The azimuth or angular quantum number (i) determines the number of sob shells in a given shall. the allowed values of l for a given value ffor n are.
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1.2.3.......................
1,2,3 ..................(n-1)
0.1.2.3................(n-1)
2,4,6,..............(n-2)
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Question # 2
Which of the following reactions does not take place with light radiation.
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Oxidation
Reduction
Polymerization
Double displacement
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Question # 3
Which of the following is a buffer solution.
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CH3COOH + NH4OH
CH3 COOH + HCl
CH3COOH + NaOH
CH3COOH + CH3COONa
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Question # 4
The maximum number of electrons in s,p,d and f sub shells are.
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2 in each
2, 6, 10, 18
2,6 ,10,14
5 in each
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Question # 5
The electronic configuration of chromium (Z =24) in the ground state is.
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[Ar] 4s
2
, 3d
4
[Ar] 3d
6
[Ar]4s
1
, 3d
5
[Ar]
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Question # 6
Heisenberg's uncertainty principle precludes the exact simultaneous measurement of.
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Velocity and energy
Velocity and time
Charge density and probability
Position and momentum
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Question # 7
The multiplicity of the electronic state is equal to.
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S + 1
2S + 1
2S - 2
2S + 2
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Question # 8
When some quantity of electricity is passed though two electrolytic cells. The ratio of the mass of the products obtained at the cathode is the same as the ratio of their
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Densities
Atomic masses
Equivalent masses
Atomic numbers
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Question # 9
CO belong to which group.
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C
2v
D
2h
C
av
D
ah
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Question # 10
Which of the following solution has pH= 11?
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1 X 10
-11
m NaOH
1 x 10
-11
m HCl
1 x 10
-3
M NaOH
1 X 10
3
M NaOH
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Question # 11
Which of the following statement is not related with high quantum yield reasons.
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Formation of reactive intermediates which may act as catalyst
The active molecules may collide with other molecules and activates these molecules.
The reaction may be exothermic and heat evolve may activate other molecule
The primary photo chemical process may be reversed
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Question # 12
The temperature at which two conjugate solutions change into one homogeneous solution is called.
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Azeotrope
Conjugate temperature
Consolute temperature
Transition temperature
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Question # 13
The temperature of which the compound melts into a liquid to the same composition as the solid is called the
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Congruent melting point
Incongruent melting point
Peritectic temperatures
Metastable point
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Question # 14
A catalyst increases the rate of a reaction because.
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It provides the necessary energy to the colliding molecules to cross energy barrier
It decreases the heat of the reaction
It decreases the order of the reaction
It provides a different path of lower activation energy.
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Question # 15
Poise is a unit of.
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Refractive index
Optical activity
Fluidity
Viscosity
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Question # 16
Which of the following statement is not related to BVT
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individual orbitals lose their indention
VBT uses the concept of resonance
VBT does not explain the paramanhetic nature of molecule
it uses only valence electron
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Question # 17
A colloidal system in which both the dispersion phase and dispersed phase are liquid is.
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Smoke
Emulsion
Whipped cream
Mist
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Question # 18
In sodium chloride type lattice, the ratio of coordination number of cation to anion is.
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6:6
7:7
4:8
4:4
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Question # 19
The branch of physics that mathematically describes the wave properties of electron in atomic is called.
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Statistical Mechanics
Quantum Mechanics
Chemical statistics
Thermodynamics
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Question # 20
At constant temperature , the decrease in Halmholts free energy is equal to.
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Decrease in entropy
Increase in entropy
Reversible work done by the system
All types of work done
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Question # 21
The vibration degrees of freedom for a linear and non liner poly atomic molecule of seven atoms each an respectively
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30 and 29
30 and 32
28 and 29
None of above
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