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Online Tests
PPSC Chemistry Part I Physical Chemistry Online Test MCQs With Answers
Question # 1
Which of the following solutions of sulphuric acid will exactly neutralize 25 mL. of 0.2 M NaOH
Choose an answer
12.5 mL of 0.1 M solution
24 mL OF 0.1 m Solution
50 mL of 0.1 M solution
None of the above
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Question # 2
Which of the following phenomena is not explained by the classical mechanics.
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Black body radiation
Photoelectric effect
Atomic and molecular spectra
Heat capacities of solids
All of the above
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Question # 3
The emission of light in a biological reaction is known as
Choose an answer
Fluorescence
Phosphorescence
Bioluminescence
Photolysia
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Question # 4
Equilibrium constant Kp and Kc are related as
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Kc = Kp (RT)delta n
Kp = Kc (RT)an
Kp = (Kc/RT)delta n
Kp -Kc = (RT)delta n
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Question # 5
Wlhich of the following can act as a protective colloid
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Gelatin
Silica gel
Oil in water emulsion
All three
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Question # 6
The number of mole of the solute dissolved per dm3 of the solution is called.
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Molality
Formality
Normality
Molarity
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Question # 7
Which is the following is not a buffer.
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H2CO3/HCO3
NH4Cl/NH4OH
CH3COOH/CH3COONa
NH3OH/CH3COOH
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Question # 8
The gases H2, N2, O2 and NH3 . H2 =2 , N2 = 28, O2 = 32 and NH3 =17 will effuse in the order.
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H2> N2> O2 > NH3
NH3 >O2 > N2 > H2
H2 > N2 > NH3 > O2
H2 >NH3 > N2 > O2
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Question # 9
The correct order of acidic strength is.
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HF < HCl< HI < HBr
HI <HBr < HCl < HF
HI < HBr < HF < HCl
HF < HCl < HBr < HI
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Question # 10
Which of the following characteristics of adsorption is wrong.
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Adsorptoin on solids is reversible in nature
Adsorption, in general increase with increase in temperature.
Adsorption is generally selective in nature.
Both enthalpy and entropy of adsorption are negative
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Question # 11
Which of the following molecules have centre of symmetry.
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H2O
HCl
CO2
H2SO4
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Question # 12
Which of the following statements is not true with reference to ionic conductors.
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Ionic conductance is due to movement of the ions
It involves the transfer of matter
It involves oxidation reduction reactions
It decreases with rise in temperature.
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Question # 13
Which of the following orbitals does not make sense.
Choose an answer
6f
4f
7s
2d
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Question # 14
Which of the following is not a true characteristics of a catalytic reaction.
Choose an answer
The amount and chemical composition of the catalyst remains unchanged after the reaction
The catalyst does not intiate a chemical reaction
The reaction in which product also act as catalysis are called autocratically reactions.
The catalyst shifts the equilibrium position of a reaction in a favorable direction
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Question # 15
According to the Langumir isotherm , when the pressure of the gas is very large, the adsorption.
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Is directly proportional to pressure
Is inversely proportional to pressure
Is directly proportional to the square of the pressure.
Is independent of pressure
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Question # 16
The extinction co efficient has the units.
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cm2 mol -1
cm3 mol-1
mol cm-3
mol cm-1
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Question # 17
The rate at which a substance reacts depends on its.
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Molecular mass
Active mass
Equivalent mass
Molar mass
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Question # 18
The constant temperature and pressure,the rates of effusion of various gases vary inversely as square root of their denature. This is a statement of.
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Boyle's law
Charles's law
Graham's law
Daltons's law
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Question # 19
Which of the following solids is a better conductor of electricity.
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Pore NaCl cyrstal
Diamond
Graphite
Marble pieces
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Question # 20
The equilibrium constants Kp and Kc are related as
Choose an answer
Kp = Kx Pdelta n
K p= Ks/P delta n
Ks = Kp (RT)delta n
Kx = Kp (P/RT) delta n
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