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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Which of the following is an example of molecular solids.
Choose an answer
MgO
ZnO
Ice
Graphite
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Question # 2
Valences bond theory was put forward by
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Pauling and Slatter
Heitler and London
Lewis
Pauli
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Question # 3
Enantiomers have which of the following characteristics.
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Rotate ordinary light
Have the same melting point
Are superimposable mirror images
React with optically active molecule at the same rate
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Question # 4
Which of the following statement is not true with respect to photo chemical reactions.
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These take place in the presence of light
Free energy of these reactions may be positive or negative
Light intensity affect these reactions
Temperature has significant affect n rate of these reactions
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Question # 5
Which of the following does not represent Lewis base.
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Pyridine
NaNH2
PCl3
NaOH
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Question # 6
in monel metal copper is alloyed wiht which metal.
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Fe
Mn
Ni
All
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Question # 7
Which of the following is most soluble in water.
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BaSO4
Sr SO4
CaSO4
MgSO4
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Question # 8
Which of the following elements has the highest melting point.
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Magnesium
Calcium
Strontium
Berylliium
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Question # 9
LPG is use this
Choose an answer
Vehicles
Aviation Fuel
Home
All above
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Question # 10
Bryllium salts on hydrolysis give.
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Basic solutions
Acidic solutions
Neutral solutions
Amphoteric solutions.
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Question # 11
The electronic configuration of chromium is 4s1, 3d5, The elements tungsten (W) belongs to the same group and has atomic number 74.The configuration of its valence shell is.
Choose an answer
5s1, 4d5
6s1, 5d5
6s1, 5d6
6s1, 5d4
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Question # 12
In a system of designating wrought aluminum alloys. what does the second digit represents.
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The purity of aluminum
The identity of the alloy
The modification of the alloy group or impurity limits
None of above
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Question # 13
The pH Value 4.2 is of
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Vinegar
Lemons
Oranges
Tomatoes
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Question # 14
The bond formed by complete transfer of electrons from electropositive to more electronegative atom is called.
Choose an answer
Ionic bond
Covalent bond
Mettalic bond
Co ordinates bond
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Question # 15
Which of the following generally increases on going from top to bottom in a group.
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Metallic charcter
Electronegativity
Oxidising behaviour
Raducing behaviour
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Question # 16
Stainless steel consists of which elements.
Choose an answer
Fe only
Cr only
Fe and Ni
Fe ,Ni and Cr
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Question # 17
Which of the following statements is not correct regarding electromagnetic spectra?
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The frequency of microwave is less than uv
The velocity of X-rays is more than uv
Cosmic rays have shorter wave length than radio waves.
The frequency of uv is greater than visible rays.
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Question # 18
BCl3 is a planar molecule because B atom is.
Choose an answer
sp2 hybridized
Sp3 hybridized
sp hybridzed
sp3 d hybridized
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Question # 19
The SI unit of pressure is Pascal it is define da sa force per unit are of 1N/m2 one atmosphere of pressure is equal to.
Choose an answer
760 mm of Hg
1 bar
101 k Pa
760 torr
All are correct
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Question # 20
Which of the following does not have an a,b, unsaturated carbonyl group.
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Androsterone
Oestrone
Testosterone
Progesterone
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Question # 21
The number of hydrogen bonds boding A _____ T pair is
Choose an answer
1
2
3
4
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Question # 22
Example of inter molecular H-bonding is
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NH3 and H2O
HF
CH3COOH
All of abvoe
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Question # 23
The _________ sphere is enclosed in brackets in formulas for complex species, and it includes the central metal ion plus the coordinated group
Choose an answer
Ligand
Donor
Coordination
Oxiation
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Question # 24
SO2 is generated from which of the following industry.
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Drying and packing
Paper
Pulp
paper and pulp
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Question # 25
Enzymes are
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Complex non living compunds
Laving organisms
Complex protein molecules
Bacterial colonies
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Question # 26
Steel that are used for axles, gears, and similar parts requiring medium to high and strength are known as.
Choose an answer
Medium carbon steel
Low carbon steel
Very high carbon
High carbon steel
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Question # 27
Combination of a -amino acid through which linkages results result in formation of protein
Choose an answer
Ester linkage
Glycosidic linkage
Lactum linkage
Peptide linkage
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Question # 28
Inter halogens are of types.
Choose an answer
3
4
5
6
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Question # 29
The equilibrium constants Kp and Kc are related as
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Kp = Kx Pdelta n
K p= Ks/P delta n
Ks = Kp (RT)delta n
Kx = Kp (P/RT) delta n
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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 is not an organic precipitating agent.
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Diemethglyoxime
Cuperon
Oxime
Acetate
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