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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
Choose an answer
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
Which of the following trihalides of nitrogen behaves as the weakest base.
Choose an answer
NF3
NCl3
NBr3
NI3
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Question # 3
Solid sodium chloride does not conduct electricity be cause.
Choose an answer
In solid NaCl, no ions are present
Solid NaCl is covalent in nature
In solid NaCl, there is no mobility of ions
In solid NaCl, there are no electrons.
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Question # 4
Which of the following elements has the highest ionization energy.
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Na
Si
Ar
Cl
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Question # 5
Ozone layer of stratosphere requires protection from indiscriminate use of.
Choose an answer
Fungicides, insecticides, bactericides and medicines
Aerosols and high flying jets
Atomic explosions and industrial wastes
Weather ballons
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Question # 6
Which of the following statements is false about enantiomers.
Choose an answer
Rotate plane of polarized light
Are superimposable mirror images
Nbonsuperimposable mirror images
All of the above
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Question # 7
What is the oxidation number of the central meal atom in the coordination compound.[Pt(NH#)#Cl]Cl
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-1
0
+2
+3
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Question # 8
Which type of elements form ionic hydrides.
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Transitionelements
Metalloids
Elements with high electronegativity
Elements with high electropositivity.
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Question # 9
Allotropic form of tin
Choose an answer
White tin
Grey tin
Rhomic tin
All above
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Question # 10
Amorphous boron on burning in air form
Choose an answer
B(OH)3
Only B2O3
Only BN
Mixture of B2O3 and BN
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Question # 11
Ingold's isoprene rule states that in tepenoids isoprene units are joined.
Choose an answer
Head to tail
Head to Head
Tail to Tail
In a random order
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Question # 12
The reciprocal of the coefficient of viscosity in called.
Choose an answer
Density
Specific gravity
Fluidity
Conductance
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Question # 13
Hydrogen bond is not electrostatic in nature is stated by
Choose an answer
Electrostatic approach
Valence bond approach
Molecular orbital approach
None of the abvoe
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Question # 14
Nitric acid is used in manufacturing of.
Choose an answer
Explosive
H2SO4
Fertilizer
All above
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Question # 15
Which of the following is a planar molecule.
Choose an answer
Acetone
Formic acid
Acetic acid
All above
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Question # 16
The metallic character of group 14 elements
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Decreases from top to bottom
Increases from top to bottom
Does not change gradully
Has no significance
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Question # 17
If Steel is heated to a temperature well below red heat and to then cooled slowly the process is called.
Choose an answer
Annealing
Quenching
Tempering
Nitriding
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Question # 18
Fluorine is.
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Powerful oxidizing agent
Most reactive element
Used as refrigerants
All of above
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Question # 19
Pick out the incorrect statement for CIF3
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It has trigonal planar geometry
It is used to make gaseous UF6 which is useful in making enriched U-235 fuel
It is used as powerful fluorinating agent for inorganic compounds
CIF2 has been used as fuel in short range rockets reating with hydrazine.
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Question # 20
Which of the following group will have hyper conjugation effect when attached to benzene.
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------ CH3
----C6H5
------C(CH3)3
---------CH(CH3)2
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Question # 21
Which of the following is not a characteristics of terpenoids.
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They are pleasant smelling liquids
They are steam volatile
They are nitrogenous bases
they are insoluble in water
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Question # 22
The equivalent conductance of a 1 N solution of an electrolyte is nearly
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The same as its specific conductance
10
3
times more than its specific conductance
10-3 times its specific conductance
100 times its specific conductance.
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Question # 23
Air pollution is not caused by
Choose an answer
Pollen grains
Hydroelectric power
Industries
automobiles
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Question # 24
HCIO evolves Cl2 and O2 when dissolve
Choose an answer
Ca
Ni
Cu
Any of above
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Question # 25
Group IV A consist of elements
Choose an answer
3
4
5
6
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Question # 26
The common temperature detecting device in DTA are.
Choose an answer
Thermocouples
Thermopiles
Thermistore
All
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Question # 27
In 1952 who popularized the use of CFT for inorganic chemist
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Bethe
Orge
Van Vleck
Werner
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Question # 28
Not a major contributor of engineering ceramics
Choose an answer
SiC
SiO2
Si3N4
BH3
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Question # 29
When 0.01 moles of NaOH are added to a buffer solution, its pH changes from 4.745 to 4.832 WHAT IS ITS.
Choose an answer
0.115
0.900
0.015
0.215
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Question # 30
In the purification of bauxite , the ore is fused with sodium carbonate in the process
Choose an answer
Baeyer's process
Hall's process
Serpeck's process
Any of above
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Question # 31
The splitting of H2O can be carried out through
Choose an answer
Photolysis
Electrolysis
Dialysis
Hydrogenation
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