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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
The wire of flash bulb is made up of.
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Cu
Ag
Mg
Ba
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Question # 2
A mixture of ethyl iodide and n-propyl iodide is subjected to Wurts reaction. The hydrocarbon that will nto be formed is
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n-butane
n-propane
n-pentane
n-hexane
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Question # 3
Electron affinities of halogens are in the order.
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F > Cl > Br > I
Cl > F > Br > I
Cl > Br > I > F
Cl > Br > F > I
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Question # 4
A compound with an congruent melting point decomposes on heating into.
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A liquid of the same composition as the solid
A new solid phase and a solution with a compositional from that of the solid phase
A new solid phase and a solution with the same composition as that of the solid phase
A solution of fixed composition
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Question # 5
The term accuracy refers to how near the observed value is to.
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Mean value
Low value
True value
Standard value
Both C and D
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Question # 6
BCl3 is a planar molecule because B atom is.
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sp2 hybridized
Sp3 hybridized
sp hybridzed
sp3 d hybridized
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Question # 7
What is a measure of rigidity?
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Stiffiness
Jardmess
Strength
Modulus of elasticity
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Question # 8
Which of the following state is not correct regarding Langmunir adsorption theory.
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Adsorbent has specific equivalent sites
One site can adsorbs only one molecule
Adsorbed molecules cannot interact with each other
Adsorption is a static process
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Question # 9
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 # 10
A diameter of human hair is approximately ________________ m
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75000
75
7.5 x 10
-5
7.5 x 10
-9
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Question # 11
The bond formed by complete transfer of electrons from electropositive to more electronegative atom is called.
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Ionic bond
Covalent bond
Mettalic bond
Co ordinates bond
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Question # 12
The number of electrons involved in bonding in Lewis structure of oxalate ion is
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20
14
22
18
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Question # 13
Manganese steel usually contains how many percent of manganese.
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1 to 5
3 to 10
11 to 14
14 to 18
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Question # 14
Which of the following is not a physical test.
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Colour test
Flame test
Beed test
Wet test
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Question # 15
Which of the following symmetry element leaves the molecule or an object unchanged.
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Proper rotation
Improper rotation
Inversion axis
Identity
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Question # 16
Which of the following pollutant results from combustion of fossil fuels.
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SO2
NO2
CO
All above
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Question # 17
Which of the following is not a colligative property.
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Elevation of B.P.
Depresaion in F.P
Viscosity
Osmotic pressure
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Question # 18
In propagation step the reaction intermediate of radical polymerization is
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Carbocation
Carbonion
Free radical
Carbene
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Question # 19
Which of the following technique describes titrations in which a standard iodine solution is need.
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Iodometry
Iodimetry
potentiometry
Argentometry
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Question # 20
The electrical conductivity of a nano tube is __________ times that of copper.
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10
100
1000
1/100
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Question # 21
Which of the following does not have an a,b, unsaturated carbonyl group.
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Androsterone
Oestrone
Testosterone
Progesterone
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Question # 22
Which of the following statements in not correct with respect to the important characteristics of aromatic compounds.
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They are usually cyclic compounds
They are resistant to usual addition reactions
They usually undergo substitution reactions
They are less stable
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Question # 23
The bond length is measured by
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X-ray diffraction
Neutron diffraction
Microwave spectroscopy
All of above
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Question # 24
The magnetic quantum number (m) specifies the individual orbital in a Sub shell for a given l, m can be.
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l,l- l........-1
l........2, l -3.......-2l
l-l-2,..........-l
l-2,l-4, ............-4l
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Question # 25
Bromination of n-butane produces.
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I-bromobutane as the major product
2- bromobutane as the major product
Both I - bromo and 2- bromobutane with equal percentage
Both i-bromo and 2-bromo products whose percentage depends upon temperature.
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Question # 26
Which of the following statement is not related to the characteristics of gaseous state.
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The inter molecular forces of attraction are not strong in gaseous state
The gases do not have definite shape and volume
The gases are characterized by low density.
The gases have low comprehensibility
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Question # 27
Glass electrode cannot be used to measure the pH of pure.
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Acetic acid
Ethyl alcohol
Gelatin
All above
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Question # 28
Which number of halogen family does not show positive oxidation state.
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Fluorine
Chlorine
Bromine
Iodine
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Question # 29
________is best in its cleaning action.
Choose an answer
Soap
Detergents
Surfactant
None of these
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Question # 30
Which halide of cesium will be highly ionic in nature.
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K+
Ag+
Rb+
Ca+
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Question # 31
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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