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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
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 # 2
Which of the following does not have an a,b, unsaturated carbonyl group.
Choose an answer
Androsterone
Oestrone
Testosterone
Progesterone
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Question # 3
The minimum amount of energy that the reacting molecules must posses at the time of collations in under to produce effective collisions is called.
Choose an answer
Free energy
Threshold energy
Activation energy
External energy
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Question # 4
What prefix in steel identification means composition varies from normal limits.
Choose an answer
E
B
X
F
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Question # 5
Arrangement of peptide chains of protein in spec to form helix stucture is referred to as.
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Primary structure
Secondary structure
Tertiary structure
Quaternary structure
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Question # 6
Drying agent which react with CO2 and removes water vapours is.
Choose an answer
CaO
CaCl2
CaCO3
Ca(NO3)2
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Question # 7
The most important conditions for the formation of ionic bond are.
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High ionization energy of the metallic atom and high electron affinity of the non metallic atom.
Low ionization of the metallic atom and low electron affinity of the non metallic atom.
Low ionization energy of metallic atom and high electron affinity of the non metallic atom
High ionization energy of the metallic atom and high electron affinity of non metallic atom.
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Question # 8
In plant noise control, which of the following method is used for reducing noise
Choose an answer
Plant planning
Control at the source
Control of radiated noise
All above
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Question # 9
The range of sound pressure for uncomfortable level is.
Choose an answer
80 - 90 dB
100 - 120 dB
130-140 dB
All above
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Question # 10
Carbon dioxide content in atmosphere is
Choose an answer
0.0034%
0.034 %
0.34 %
3.4 %
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Question # 11
Which of the following species is very good oxidizing agent.
Choose an answer
MnO
4
H+
Zn
2+
Fe
3+
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Question # 12
Which of the following metal acts as pollutant.
Choose an answer
Hg
Pb
Zn
Ni
All above
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Question # 13
Which of the following is not a component of flame photometer.
Choose an answer
Pressure regulator and flow meter
The atomizer
The burner
Hallow cathode lamp
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Question # 14
According to Fajns rules, which one of following results in increased ionic nature of the covalent bond.
Choose an answer
Larger cation and smaller charges on anion
Larger cation and larger charge on anion
Smaller cation and smaller charge on anion
Smaller cation and larger charge on anion
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Question # 15
Soft drinks and baby feeding bottles are generally made up
Choose an answer
Polyeater
Polyurethens
Polyamide
Polyetyrene
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Question # 16
Shows a regular increase on moving down the group form carbon to lead
Choose an answer
Atomic volume
Atomic radius
Density
All above
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Question # 17
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 # 18
Which of the following statement is not correct regarding dissociation constant (Ka)?
Choose an answer
It is a measure of the tendency of an acid to split up into ions
The greater the value of Ka, more is the dissociation
It is determined by conductimetric method
It is not a proper parameter for weak acids
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Question # 19
Among alkali metals, the least metallic element is.
Choose an answer
Li
Na
Rb
Cs
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Question # 20
In Serpekr's process the ore is treated with which of the following.
Choose an answer
Carbon
Nitrogen gas
Both A and B
None of these
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Question # 21
The vitamin which is related to monossaccharides is.
Choose an answer
Vitamin A
Vitamin C
Vitamin D
Vitamin E
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Question # 22
Which of the following techniques involves the distribution of solute between two immiscible liquid phases.
Choose an answer
Chromatography
Electrophoresis
Solvent extractions
Solid phase extraction
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Question # 23
Which of the following is an important aspect of industrial ecology.
Choose an answer
Minimising air emissions
Minimising liquid waste
Recycling after use
All above
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Question # 24
Which one of the following statements regarding BF3 is not correct.
Choose an answer
It is an ionic compound
It is an electron deficient compound
It is a Lewis acid
It forms adducts
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Question # 25
Berllium has diagonal relationship with
Choose an answer
Li
Al
B
Na
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Question # 26
Beryllium shows diagonal relationship with.
Choose an answer
Mg
Al
Na
B
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Question # 27
Which among the following is secondary pollutant.
Choose an answer
CO
CO2
PAN
Aerosol
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Question # 28
In C4-axis of rotation, an object in rotated through an angle of.
Choose an answer
120
o
180
o
100
o
90
o
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Question # 29
Excluding H-atom , Hydrogen bond never involves more than atoms.
Choose an answer
One
Two
Three
Four
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Question # 30
In Dumas method, the volume of the gas collected is equivalent to which of the following gases set free from the compound.
Choose an answer
Ammonia
O2
N2
NO
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Question # 31
Polyamide jinkage is present in
Choose an answer
Nylon
Silk
Protein
All of these
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