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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
The device that convert the chemical energy of fuel directly into electrical energy is called.
Choose an answer
Galvanic cell
Electrolytic cell
Fuel cell
Concentration cell
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Question # 2
Elements of group 14
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Exhibit oxidation state of -4
Exhibit oxidation state of +4
From M3+ and M4+ ions
Form M4- and M4+ iona
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Question # 3
A system is said to be in the colloidal state if the particle size of the dispersed phase ranges from
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o
I to 10 A
10 to 10000 A
10 to 100 A
1000 to 10000 A
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Question # 4
The branch of chemistry which deals with the analysis of chemical products is known as.
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Physical chemistry
Organic chemistry
Inorganic chemistry
Analytical chemistry
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Question # 5
Electronegativity is given by
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Average of first and second ionization energies.
Average of first and second electron affinites
Average of ionization energy and electron affinity
None of the above
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Question # 6
Elements in which differentiating electron enters the (n-1) the d-orbitals of the (n-1) the main shell are called elements.
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s- block
p-block
d-block
f-block
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Question # 7
The link between classical thermodynamics and quantum mechanics is prevented by
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Statiatical mechanics
Boltzmann law
Wave mechanics
Matrix mechanics
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Question # 8
Polyamide jinkage is present in
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Nylon
Silk
Protein
All of these
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Question # 9
Biogical role of nucleic acid doe snot include
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Genetic continuity
Protein syathesis
Hybridization
Mutation
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Question # 10
The maximum degree of freedom for a pure substance under equilibrium constitutions is
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1
2
3
zero
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Question # 11
The number of coordinates required to specify the position of all the atoms in a molecule is called number of degree of freedom. The vibration degrees of freedom of a linear molecule containing N atoms are
Choose an answer
2N-5
2N -6
3N -5
N-6
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Question # 12
Pick out the incorrect statement about K2Cr2O7
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It is thermally stable
It dissolves in alkali to form chromate
It oxidizes acidified FeSO4 solution to Fe2(SO4)3
It is used as cleansing agent for glassware. etc. When mixed with cold con. H2SO4
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Question # 13
The common oxidation state of lanthanides is.
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+3
+2
+1
+4
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Question # 14
Which of the following does not apply to nanotechnology.
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It is a general purpose technology
It can be called Green technology
Newtonian mechanics can describe it.
It involves rearrangement of atoms
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Question # 15
The solution of the transition metal complexes having one or more unpaired electrons in the d-orbital are.
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Coloured
Colourless
White
None of above
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Question # 16
Which of the following glass transmits the maximum light.
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Serrated glass
Clear glass
Milk glass
Opalescent glass
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Question # 17
Which type of the solids are generally good conductors of electricty.
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Covalent
Ionic
Metallic
Molecular
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Question # 18
Which of the following cast irons is a high carbon, iron carbon silicon alloy.
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Deorizers
Deoxidizers
Deoxifiers
Deterrent
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Question # 19
The denationalization involving C - H sigma bond electrons is known as .
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Conjugation
Hyperconjugation
Mesomerism
Resonance
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Question # 20
The element with atomic numebr greater than 100 are known as
Choose an answer
Trans uranium elements
Trans fermium elements
Actinides
Lanthanides
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Question # 21
XeF4 is obtained, when a mixture of Xenon and fluorine in the ratio is heated in a nickle vessel at 400
o
C
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1 : 3
5 :1
1 :20
1 :5
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Question # 22
The basic strength of hydrides of group 15 elements very in the following order.
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NH3 > PH3 > AsH3 > SbH3 >BiH3
PH3 > NH3 > AsH3> SbH3 > BiH3
BiH3> NH3 >PH3 > AsH3 > SbH3
NH3 > PH3 > SbH3 > AsH3 > BiH3
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Question # 23
For which of the following compounds is the rate of hydrolysis by aqueous alkali most likely to be independent of the hydroxide ion concentration.
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1-Chlorobutane
2- Bromobutane
1- Iodobutane
2- Bromo -2- methyl butane
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Question # 24
Which of the following molecules can oxhibit geometrical isomerism.
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CH3CH = CH2
CH3CH = CHCH3
(CH3)2 C = CH2
CH3CH = C(CH3)2
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Question # 25
The minimum amount of energy that the reacting molecules must posses at the time of collations in under to produce effective collisions is called.
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Free energy
Threshold energy
Activation energy
External energy
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Question # 26
The reciprocal of the coefficient of viscosity in called.
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Density
Specific gravity
Fluidity
Conductance
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Question # 27
Which of the following hydroxides is most stable.
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Mg (OH)2
Ca(OH)2
Sr (OH)2
Ba (OH)2
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Question # 28
Mostly used solvents for ionic compounds.
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Liquid ammonia
Liquid SO2
Liquid HF
All above
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Question # 29
Which of the following property has a higher value for trans isomer as compared to cis isomer.
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Density
Dipole moment
Melting point
Boiling point
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Question # 30
Among the solvents given below, with dielectric constant (E) given in parentheses which has highest solubility of KCI?
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Benzene (E=O)
Carbon disulphide (E = O)
Methanol (E =32)
Acetone (E = 2)
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Question # 31
Stainless steel contains
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Fe+Cr+Ni
Fe+Ni+Cu
Fe + Cr+ Cu
Cu + C + Ni
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