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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Select the major product obtained from the addition of HBr to I -Methyl cyclohexene
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1-bromo -2- methyl cyclohexane
6- bromo-i- methyl cyclohex -i- ene
3- bromo -1- methyl cyclohex - 1- ene
I-bromo -I- methyl cyclohexane
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Question # 2
The alternate feasible fuel for existence of mankind to
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Uranium
Wood
Bontonite
Cloth residues
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Question # 3
The noble gas which was discovered first in the sun and then on the earth is.
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Helium
Neon
Argon
Xenon
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Question # 4
When metal orbital are rotated in octahedral field the following representation obtained.
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t2 g + lg
a1 g
t 1 u
All above
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Question # 5
Which among the following is least soluble in water.
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NaF
LiF
KF
CsF
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Question # 6
Which of the following metals is the most abundant in the earth's crust.
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Mg
Ca
K
Na
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Question # 7
The noble gases which does not I do not form any clathrates is.
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He
Ne
Argpm
Both He and Ne
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Question # 8
Which of the following statements is not correct.
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The conductance of one cm3 of a material is called specific conductance
Specific conductance increase while equivalent conductance decreases on progressive dilution
The limiting equivalent conductance of weak electrolytes cannot be determined by extrapolation of the plot of A against concentration
The conductivity of metals is due to the movement of elctrons.
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Question # 9
Which of the following steps is not involved in chemical analysis.
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Separation of sample in pure form
Separation of the sample in the mixture form
Preparation of sample for the analyisis
Validity of experimental results
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Question # 10
Which of the following statement is not true with respect to the role of matter undergoing decomposition.
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Decomposed matter increase soil fertility
They provide a texture which is favorable for plant growth
Organic compounds for complexes with mineral nutrients which enhance uptake by plants.
In high concentration the decomposition product may increase the photosynthesis
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Question # 11
Temporary hardness of water is due to.
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Bicarbonates of K
Bicarbonates of Na
Carbonates of Ca
Bicarbonates of Ca
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Question # 12
The word 'ceramic' meant for.
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Soft material
Hard material
Burnt material
Dry material
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Question # 13
In sodium chloride type lattice, the ratio of coordination number of cation to anion is.
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6:6
7:7
4:8
4:4
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Question # 14
Which of the following is most soluble in water.
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BaSO4
Sr SO4
CaSO4
MgSO4
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Question # 15
The IUPAC suffix used for ______ NC group is
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Cyanide
Isocyanides
Carbylamines
Nitrite
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Question # 16
The Langmuir theory of unimolecular adsorption is generally valid at.
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Low pressures and low temperature
Low pressures and high temperature
High pressures and low temperature
High pressure and high temperature
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Question # 17
The spectral line obtained when an electron jumps from n = 6 to n= 3 belongs to.
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Balmer series
Layman series
Paschen series
Bracket series
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Question # 18
Which of the following metal ion cannot be catimated by gravimetric analysis.
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K+
Ca
2+
Al3+
Zn2+
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Question # 19
Which of the following is not chemical characteristics of water.
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pH
COD
BOD
Colour
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Question # 20
Which of the following dye is used an antiseptic .
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Methyl orange
Mercurochrome
Alizarin
Bismarck brown
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Question # 21
Oxidative enzymes are responsible for
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Biological processes
Biological oxidation
Biological hydrolysis
Biological isomerisation
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Question # 22
Coulometry is based on the measurement of
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Electrical current
Electrical potential
Electrical conductance
Dielectric constant
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Question # 23
Pick out the ideal conditions needed for the manufacture of H2SO4 by contact process.
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Low temperature high pressure and high concentration of reactants
Low temperature , low concentration of reactants and low pressure
High temperature high pressure and high concentration of reactants
Low temperature, low pressure and high concentration of reactants.
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Question # 24
The compounds whose formation require a host compound and a guest compound are called.
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Exclusion compounds
Inclusion compounds
Crystal compounds
None of the above
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Question # 25
Which of the following reactions is employed to produce ozone in the laboratory.
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Exposure of air to UV light
Reaction of F2 with H2O at low temperature
Reaction SO2 with H2O2
Passage of silent electric discharge through oxygen
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Question # 26
The oxidation number Xe in XeOF2 is
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0
+2
+4
+3
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Question # 27
Which sequence of steps is correct in paper making machine
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Pressing Dyring, Flow spreader Calender stock
Flow spreader, Pressing, Prying Calender sock
Drying ,Pressing , Flow spreader, Calender stock
None of above
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Question # 28
Transition metal possess
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Definite color
Catalytic power
Both A and B
None of above
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Question # 29
Radon is obtained only in the radioactive decay of
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Radium
Thorium
Actinium
Any of above
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Question # 30
Mangalium is an alloy of.
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Al + Mg
Mg + Ai + Mn
Mg + Ai + Cu
Mg + Ai + Cu + Mn
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Question # 31
The rays emitted by the cathode in a gas discharge tube under low pressure and high voltage of electricity are called cathode rays. Which of the following properties are not related to cathode rays.
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These travel in a straight lines.
These are deflected by magnetic and electric field.
Minerals Fluoreace with a characteristic color when placed in a beam of cathode rays.
These are dependent of the material used for the electrode.
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