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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Pick out incorrect statement about K2Cr2O7
Choose an answer
It oxidizes acidified solution H2SO4 to S
It oxidizes KI to I2
It oxidizes HCl to Cl2
It gives oxygen, when treated with cold conc. H2SO4
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Question # 2
Which of the following type of lattice has maximum numb of atoms per unit cell.
Choose an answer
Simple cubic
Body centred cubic
Face centred cubic
All of them
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Question # 3
Soap is soluble in grease because it
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Is non polar
Has a hydrophobic head
Has a hydrophobic tail
Has an ionic head and a hydrocarbon tail
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Question # 4
An stereospecific enzyme in one which catalyses
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Formation of one stercolsomer
Reaction of one stereoisomer only
Both of these
None of these
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Question # 5
Which of the following statement is not related with the effect of thermal pollution.
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Decrease in BOD
Increase in BOD
Reduction in DO
Change in algal production
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Question # 6
One of the best fluorinating agent is
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XeF2
XeF4
XeF6
None of above
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Question # 7
Co ordinate compounds are
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Polar
Non polar
Dem polar
None of above
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Question # 8
Which of tetra chloride is resistant to hydrolysis.
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CCl4
SiCl4
GeCl4
SnCl4
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Question # 9
Which of the following elements display maximum tnedency to form P Pi - p PI multiple bonds with itself and with carbon and oxygen.
Choose an answer
N
p
Bi
As
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Question # 10
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 # 11
White Phosphorus is kept under
Choose an answer
Cold water
Ammonia liquor
Ethanol
Kerosene
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Question # 12
Among alkali metals, the least metallic element is.
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Li
Na
Rb
Cs
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Question # 13
Which of the following compounds would you use in order to obtain a crystalline derivative of an aromatic amine.
Choose an answer
2,4 Dinitrophenyl hydrazine
Nitrous acid
Benzoyl chlride
None of these
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Question # 14
Copper occurs in nature as.
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Native
Combined
Both native and combined
None of the above
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Question # 15
Gases and dust particles are removed from H2SO4 by
Choose an answer
Tydal effect
Drying tower
Absorption tower
Contact converter
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Question # 16
What letter suffix steel identification means that it is steel with boron as an alloying elements.
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xxL xx
xxBxx
xxHxx
xxKxx
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Question # 17
Which of the following disposal method is used for agriculture wastes.
Choose an answer
Dump
Landfill
Incineration
Open burning
All above
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Question # 18
A major constituent of materials one whose amount in the materials is
Choose an answer
1% or more
0.1%
0.01%
0.001 %
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Question # 19
Each fat or oil in made up of
Choose an answer
A distinctive mixture of several different triglycorides
A distinctive mixture of several aldehydes
Mixture of above both
None of above
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Question # 20
Turpentine is obtained from._______________
Choose an answer
Oak tree
Pine tree
Birch tree
Lemon tree
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Question # 21
Which of the following is not a characteristics of terponoids.
Choose an answer
They are pleasant smelling liquids
They are steam volatile
They are nitrogenous bases
They are insoluble in water
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Question # 22
Which of the following analytical technique is based on the refraction of radiation.
Choose an answer
Conductometry
Refractometry
Coulometry
Potentiaometry
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Question # 23
Most commercial glasses consist of
Choose an answer
Lime
Soda
Silica
All
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Question # 24
The formula of sulphur sequioxide
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SO4
S2O7
S2O3
SO3
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Question # 25
Which of the following play significant role in depletion of ozone layer.
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Oxides of nitrogen
Oxides of carbon
Oxides of sulphur
None of above
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Question # 26
Which of the following has the highest melting poing.
Choose an answer
NaCl
Li Cl
KCl
Rb Cl
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Question # 27
Which of the following is the best indicator for titration of CH3COH with NaOH
Choose an answer
Methyl orange
Methyl red
Phenophthalein
Eosin
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Question # 28
The overall energy change during the Cannot cycle to.
Choose an answer
Equal to zero
Equal to Q
Equal to W
Maximum
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Question # 29
The decrease in electron density at one position accompanied by a corresponding increase at other position is called.
Choose an answer
Inductive effect
Asymmetric effect
Electromeric effect
Resonance effect
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Question # 30
Which of the following is branch chain polymer.
Choose an answer
Glycogen
Terylene
PVC
Orlen
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Question # 31
Which of the following statement is not correct n respect of Arrhenius concept.
Choose an answer
The concept is applicable only for aqueous systems.
Neutralization takes place in aqueous mediam only
TH+ ion cannot remain as such in water
This concept is applicable for non aqueous system only.
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