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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
All the member of group III A are metals except.
Choose an answer
B
Ai
Ga
In
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Question # 2
The key element to be considered when evaluating a health hazard is.
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The amount of material the employee is exposed.
The total time of exposure
The toxicity of the substance
All above
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Question # 3
Hydrolith is the common name of
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NaH
CaH2
NaF
CaF2
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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 dye obtained from madder root
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Indogotin
Indanthrene
Alizarin
Acriflavin
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Question # 6
Natural fertilizers are materials derived from
Choose an answer
Plants
Animal
Algae
All of above
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Question # 7
The ions Sc3+ , Ca2+ and K+ have same electronic configuration as that of.
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Neon
Argon
Krypton
Xenon
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Question # 8
Ground water is threatened with pollution from which of the following source.
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Domestic wastes
Industrial wastes
Agricultural wastes
All above
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Question # 9
The chrome vanadium steels contain how many percent of vanadium.
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0.15 to 0.30
0.05 to 0.15
0.30 to 0.45
0.45 to 0.60
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Question # 10
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 # 11
Which among the following is a Talse statement.
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SO3 is obtained by the catalytic oxidation of SO2
SO3 has trigonal planar geometry in gaseous state
SO3 in nauseous state has all S-O bonds equivalent
SO3 gas shows more solubility in water than in H2SO4
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Question # 12
The inert gases Ar, Kr and Ke form compounds with water at low temperature and high pressure. These compounds are called.
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Halides
Hydrates
Clathrates
All of above
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Question # 13
Magnalium is alloy of Aluminium which is used in
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Scientific apparatus
Aircraft parts
Rail road care
Boat machinery
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Question # 14
Which of the following statement is not true is case of catalytic reforming.
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Dehydrogenations high endothermic
Dehydrogenation is exothermic
Hydrodealkylation reactions are endothermic
None of these
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Question # 15
Which of the following techniques is involved in purification of organic compound.
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Distillation
Sublimation
Solvent extraction
All above
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Question # 16
The pH of the 0.0032 M H2SO4 is.
Choose an answer
3.2
4.0
2.198
1.0
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Question # 17
Citral when heated with KHSO4 forms.
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Isoprene
p-cymene
p-menthane
Dipentene
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Question # 18
Cytosine a pyrimidine base pairs with
Choose an answer
Guanine
Thymine
Adenine
Any of these
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Question # 19
Dolmite is a mineral whose formula is.
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CaCO3
Mg CO3
CaCO3, MgCO3
CaSO4
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Question # 20
Which of the following alkaline earth metals occurs in radioactive form in nature.
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Ca
Mg
Ra
Ba
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Question # 21
CO belong to which group.
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C
2v
D
2h
C
av
D
ah
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Question # 22
The unit of sodium chloride structure is.
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Linear
Cubic
Tetrahedral
Square planner
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Question # 23
Which of the following combination is used to make buffer.
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NaOH and HCl
KOH and H2SO4
CH3COOH and CH3COONa
CH3COOH and NH4OH
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Question # 24
pKa value of hyponitrous acid is.
Choose an answer
-7.0
8.9
4.1
6.6
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Question # 25
1 nanometre =___________ cm
Choose an answer
10
-9
10
-8
10
-7
10
-6
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Question # 26
Conductometry is based on
Choose an answer
Electric current
Electrical potential
Absorbance
Electrical conductance
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Question # 27
Which of the following is not an intensive property.
Choose an answer
Melting point
Refractive index
Entropy
Density
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Question # 28
Which of the following ions is smallest in size.
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F-
Cl-
I-
Br-
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Question # 29
The Langmuir adsorption iso therrn shows that the amount of adsorbed gas per gram of the solid is equal to.
Choose an answer
ap/1+bp
ap+1/1-bp
1+ap/1-bp
a(1+bp)
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Question # 30
Which of the following solids is a better conductor of electricity.
Choose an answer
Pore NaCl cyrstal
Diamond
Graphite
Marble pieces
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Question # 31
The light absorbed in UV and visible region causes.
Choose an answer
Vibrational energy changes
Rotational energy changes
Electronic excitation
All of these
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