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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Helium is used for
Choose an answer
The preservation of food
Filling electrical transformer
Pressuring agent in rockets
All of above
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Question # 2
The suffix '-ene' in the name of fullerene shows the presence of ___ in the molecule.
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One triple bond
One double bond
Two single bonds
Two triple bonds
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Question # 3
Which of the following acid radical gives chromyl chorate test.
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F-
I-
Cl-
Br-
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Question # 4
Zero group of the periodic table consists of.
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Four elements
Five elements
Six elements
Eight elements
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Question # 5
Artificial nitrogen fixation may occur by the formation of.
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Nitric acid
Ammonia
Nitrides
Any of above
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Question # 6
Which of the following metals form volatile carboyl with CO below 80
o
C
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Cu
Fe
CO
Ni
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Question # 7
Number of unpaired electrons in Cu2+ ions are.
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1
2
3
4
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Question # 8
Which of the following statements is not correct with respect to applications of Hammett equations.
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It develops a quantitative relationship between structure and reactivity
This equation on can be used to calculate the value of pK
a
This equation does not help to calculate the rate of some reactions
This equation has mechanistic implications
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Question # 9
The use of acids to remove oxides and acids on hot worked steels is known as
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Tempering
Picking
Machining
Sizing
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Question # 10
In the formation of H2O molecule, the oxygen atom makes use of.
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2p orbitals
sp hybrid orbitals
Sp2 hybrid orbitals
Sp3 hybrid orbitals
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Question # 11
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 # 12
Which of the following statements false about transition metals.
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They form complexes
They show variable valency
All transiting metal compounds are paramagnetic
They form coloured ions
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Question # 13
What is the colour of pulp obtained from chemical pulping.
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Black
Brown
Blue
Red
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Question # 14
At high temperature nitrogen combines with calcium carbide to give
Choose an answer
Calcium cyanide
Calcium cyanamide
Calcium nitride
Calcium cabonate
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Question # 15
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 # 16
Which of the following analytical method is based on the rotation of light ratiation
Choose an answer
Refractomerty
Polarimetry
Interformetry
Polarography
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Question # 17
Which of the following statement is not related to collision theory.
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Molecules must collide with each other to do a chemical reaction
Molecules must posses a minimum amount of energy
Molecules must have proper orientation
Collision theory is applicable to liquid only.
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Question # 18
Which of the following compounds would be most ionic to charcter.
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PbCl4
PbCl2
SnCl4
SnCl2
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Question # 19
Proteins have characteristics
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Melting poirn t
Iso electric point
Boiling point
All of these
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Question # 20
Which of the following technique is not related to instrumental analysis.
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Optical method
Colorimetry
Polarography
Gravimetric analysis
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Question # 21
CFT can very well explain
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Color
Magnetic properties
Spectra of transition metal
All
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Question # 22
Which of the following effects best explains that o-nitro phenol is insoluble in water.
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Inductive effect
Resonance effect
Intramolecular H -bonding
Isomeric effect
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Question # 23
Ten elements Sc (Z = 21) to Zn (Z = 30) fill their 4s orbitals first and then 3d orbitals are called elements. of.
Choose an answer
3 d series.
4d Series
5d Series
None of above
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Question # 24
The pH of the 1.3 x 10
-4
NH
4
Cl is
Choose an answer
1.3
4.0
2.886
3.886
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Question # 25
Which of the following dyes belongs to the group of acridine dyes.
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Acriflavin
Alizarin
Indigotin
Cyanine
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Question # 26
Valence bond theory is also called as
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Electron pair theory
Band theory
Electron gas theory
Electron pool theory
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Question # 27
The one in which the acceptor atom is of low positive charge, Large size and has several outer electrons which can be easily excited is a.
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Soft base
Hard Base
Soft acid
Hard acid
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Question # 28
Which metal burns in air at high temperature with the evolution of much heat.
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Cu
Hg
Pb
Al
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Question # 29
Given A + 3B ____________ 2C + D
This reaction is first under with respect to reactant A and second order with respect to reactant B . If the concentration of A is doubled and the concentration of B is halved, the rate of the reaction would _____ by factor of _____________
Choose an answer
Increase ,2
Decrease ,2
Increase ,4
Decrease ,4
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Question # 30
The carbonate of which of the following will have highest lattice energy.
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Barium
Magnesium
Calcium
Strontium
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Question # 31
Which of the following detector is used in HPLC system.
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Differential refractometer detector
UV detector
Diode array detector
All above
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