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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Allotropic form of tin
Choose an answer
White tin
Grey tin
Rhomic tin
All above
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Question # 2
Which of the following techniques is used to separate a mixture of cations.
Choose an answer
GC
FPLC
Ion exchange chromatography
Size exchange chromatography
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Question # 3
How many unpaired electron are there in a strong field iron (II) octahederal compled.
Choose an answer
0
1
2
4
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Question # 4
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 # 5
Which of the following is not an ore of iron.
Choose an answer
Haematite
Magnetite
Siderite
Monazite
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Question # 6
In the forth floatation process for the purification of ores, the ore particles float because.
Choose an answer
They are light
Their surface is not easily vetted by water
They bear electrostatic charge
They are insoluble
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Question # 7
The migration of positively charged colloidal particles, under an electrical field , towards the cathode is called.
Choose an answer
Cataphoresis
Electroamosis
Sedimentation
Electrodialysis
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Question # 8
Bromine is used as
Choose an answer
Fungicides
Herbicides
Germicides
Insecticides
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Question # 9
What group of steels are molybdenum high sped steels.
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Group A
Group D
Group M
Group H
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Question # 10
For which of the following compounds is the rate of hydrolysis by aqueous alkali most likely to be independent of the hydroxide ion concentration.
Choose an answer
1-Chlorobutane
2- Bromobutane
1- Iodobutane
2- Bromo -2- methyl butane
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Question # 11
A combination of atomic orbitals produces a large number of closely special energy states brown as.
Choose an answer
Packet of energy
Band of energy
Botha a and b
None of the above
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Question # 12
Manganese steel usually contains how many percent of manganese.
Choose an answer
1 to 5
3 to 10
11 to 14
14 to 18
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Question # 13
Enzymatic action is heat at a fixed
Choose an answer
Temparature
pH
Both of these
None of these
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Question # 14
Which of the following will be most effective int he coagulntion of
Fe (OH)3 sol.
Choose an answer
NaCl
MgSO4
AlCl3
Mg3 (PO4)2
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Question # 15
Which of the ionic possesses highest bond energy.
Choose an answer
C-C
Si -Si
Ge - Ge
Sn -Sn
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Question # 16
Two solids A and B have appreciable different solubility in water but their m.p. are very close. The mixture A and B can be separated by.
Choose an answer
Sublimation
Distillation
Fractional crystallization
Specific rotation
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Question # 17
The correct order of acid strength is.
Choose an answer
HIO4 > HBrO4 > HCIO4
HCIO4> HBrO4 > HIO4
HBrO4 > HIO4 > HCIO4
HBrO4 > HCIO4 > HIO4
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Question # 18
The criteria for aromatically is presence of
Choose an answer
Uneaturations
Cyclic structure
Presence of 4nx electrons
Presence of 4n + 2n electrons
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Question # 19
Beside the common silica based SPE particles, polymer supports are also available They have advantages over silica based SPE particles, Which of the following reason is possible.
Choose an answer
These are stable over a wide pH range.
These do not possesses residual silica groups
These are designed to be wettable and have high capacity than silica base particles.
All above
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Question # 20
Which isotope of hydrogen is radioactive in nature.
Choose an answer
Protium and deuterium
Tritium only
Tritium and deuterium
Only deuterium
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Question # 21
The number 7.43 is rounded to
Choose an answer
7,44
7.4
7.45
7.3
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Question # 22
The oxidation number of Mn in KMnO4
Choose an answer
+5
+7
+4
+3
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Question # 23
Which of the following pollutant results from combustion of fossil fuels.
Choose an answer
SO2
NO2
CO
All above
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Question # 24
Low quality steels with an M. Suffix on the designation intended for non structural application is classified as.
Choose an answer
Merchant quality
Commercial quality
Drawing quality
Low quality
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Question # 25
An explosive
Choose an answer
Nitroglycerine
Trinitrotoluene
Fluorine perchlorate
All above
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Question # 26
The elements with highest electron affinity belongs to.
Choose an answer
Period 2 , group 17
Period 3, group 17
Period 2, group 18
Period, 2 , group 1
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Question # 27
Acid rain is caused due to increase in the concentration of _______ in the atmosphere
Choose an answer
Ozone and dust
CO2 and CO
SO3 and CO
SO2 and NO2
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Question # 28
Temporary hard water is softened on industrial scale by adding.
Choose an answer
Mg(OH)2
Ca(OH)2
KOH
NaOH
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Question # 29
Which of the following species is not a basic radical.
Choose an answer
Ag+
Cl-
Ba2+
K+
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Question # 30
Any property whose magnitude is independent of the amount of substance present is called a/an
Choose an answer
Extensive property
Colligative property
Structural propety
Intensive property
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Question # 31
Formula of orthophosphoric acid.
Choose an answer
H2PO4
H3PO3
H3PO2
H4P2O5
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