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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
In compressive strength of a nanotube ______ its tensile strength.
Choose an answer
I less than
Is greater than
Is equal to
Less than or equal to.
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Question # 2
The equation which relates the reaction rates and equilibrium constants of many reactions is known as.
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Taft equation
Hammett equation
Differential equation
Linear equation
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Question # 3
The most common beta brase with a composition of 60 % copper and 40% zinc is called.
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Yellow brase
Red brase
Muntz metal
None of above
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Question # 4
An induction of dipole or polarity in non polar bond, and consequent electron shifting along a chain of atoms is known as.
Choose an answer
Inductive effect
Resonance effect
Hyper conjugation
None of the above
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Question # 5
When FeSO4 is added in the sodium extract the compound formed is.
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Only Na4[Fe (CN)6]
Only Fe (OH)2
Only Na2So4
Mixture of all these
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Question # 6
The lightest alkali metal is.
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Lithium
Sodium
Rubidium
Caesium
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Question # 7
The splitting of H2O can be carried out through
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Photolysis
Electrolysis
Dialysis
Hydrogenation
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Question # 8
Which of the following statement is not correct.
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The element with highest IE belongs to group 18
In each period the element with lowest IE belongs to group I
In each period the element with highest IE is a noble gas
In the second period as we move from left to right, ionization energy increases reqularly.
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Question # 9
When HCl is titrated against NaOH , the pH at the equivalence point is.
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zero
> 7
< 7
14
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Question # 10
The alpha iron will become paramagnetic at temperature above
Choose an answer
770 C
550 C
660 C
440 C
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Question # 11
Which of the following compounds would you use in order to obtain a crystalline derivative of an aromatic amine.
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2,4 Dinitrophenyl hydrazine
Nitrous acid
Benzoyl chlride
None of these
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Question # 12
Elements in the same vertical group of the periodical have same
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Number of electron
Atomic number
Number of valence elections
Electronic configuration
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Question # 13
Which is the correct configuration of Fe3+ (Z= 26)?
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[Ar] 4s
2
, 3d
6
[Ar] 4s
2
, 4d
5
[Ar] 3d
5
None of these
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Question # 14
Soft drinks and baby feeding bottles are generally made up
Choose an answer
Polyeater
Polyurethens
Polyamide
Polyetyrene
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Question # 15
Which of the following method is used for the coventrating of ores.
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Gravity separation
Magnetic concentration
Fourth floatation
Electrostatic concentration
All
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Question # 16
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 # 17
If there are only two components in a solution with mole fraction X
A
and X
B
then which of the following relation is correct.
Choose an answer
X
A
+ X
B
= 0
X
A
+ X
B
> 1
XA = XB < 1
XA = 1 - XB
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Question # 18
Aviation Fuel contains.
Choose an answer
Light Naphtha
Medium Naphtha
Kerosene
Diesel
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Question # 19
Which of the following statements is NOT true .
Choose an answer
About 10% of the earth's crust is iron
Pure iron does not have significant industrial use because it is too weak and soft.
Steel in an alloy of carbon and iron with limits on the amount of carbon
None of above
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Question # 20
The correct order of acid strength is.
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HIO4 > HBrO4 > HCIO4
HCIO4> HBrO4 > HIO4
HBrO4 > HIO4 > HCIO4
HBrO4 > HCIO4 > HIO4
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Question # 21
Which of the following substance has been advocated as fuel of future.
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O2
N2
H2
H2O
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Question # 22
Which of the following analytical technique is based on the emission of light radiation.
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Flame photometry
Atomic absorption spectrophotometry
Raman spectroscopy
Conductometry
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Question # 23
The pKa of acetic acid is 4.74 which implies that.
Choose an answer
pH of 1N solution is 4.74
At pH 4.74 the dissociation of acetic acid is maximum
At pH 4.74 half of the acetic acid molecules are dissociated in the solution.
At pH 4.74 the dissociation of acetic acid is minimum.
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Question # 24
The emission of light in a biological reaction in known as.
Choose an answer
Fluorencence
Phosphoreacence
Biolumineacence
Phtolysis
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Question # 25
The chrome vanadium steels contain how many percent of vanadium.
Choose an answer
0.15 to 0.30
0.05 to 0.15
0.30 to 0.45
0.45 to 0.60
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Question # 26
The oxidation number of Mn in KMnO4
Choose an answer
+5
+7
+4
+3
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Question # 27
The one which is not a purine base
Choose an answer
Cytosine
Guanine
None of these
Adenine
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Question # 28
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 # 29
Which type of polymer the Nylon -06 is
Choose an answer
Polyamide
Polyester
Addition
Homopolymer
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Question # 30
The atomic and ionic radii value on moving from left to right in the sereis.
Choose an answer
Increase
Decrease
Does not change
None of above
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Question # 31
Setting of plaster of Paris volves.
Choose an answer
Oxidation with atmospheric oxygen
Combination with atmosphere CO2
Dehydration
Hydration to yield another hydrate
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