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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Which of the following statement is not related to BVT
Choose an answer
individual orbitals lose their indention
VBT uses the concept of resonance
VBT does not explain the paramanhetic nature of molecule
it uses only valence electron
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Question # 2
The property measured in TGA is
Choose an answer
Change in weight
Rate of change in weight
Heat envolved and absorbed
Change of temperature.
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Question # 3
Select the correct IUPAC nae for [Co(NH3)6 ]2+
Choose an answer
Hexammoniacobaltate (II) ion
Hexaamminecobaltate (II) ion
Hexammoniacobalt (II) ion
Hexaamminecobalt (II) ion
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Question # 4
Aviation Fuel contains.
Choose an answer
Light Naphtha
Medium Naphtha
Kerosene
Diesel
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Question # 5
Which librates H2 with NaOH
Choose an answer
B
AI
Zn
All
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Question # 6
Finely divided iron combines with CO to give.
Choose an answer
Fe(CO)5
Fe2(CO)9
Fe(CO)12
Fe(CO)6
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Question # 7
Brass is an alloy of
Choose an answer
Copper and tin
Copper and zinc
Aluminium and nickel
Leed and tin
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Question # 8
Which of the following process is involved in the purification of crude metals.
Choose an answer
Liquation process
Oxidation process
Distillation process
Electro refining
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Question # 9
Iron which contains up to 1% carbon is called.
Choose an answer
Steel
Cast iron
Wrought iron
Pig iron
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Question # 10
The size of nanoparticles is between __________ nm
Choose an answer
100 to 1000
1 to 100
0.1 to 10
0.01 to 1
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Question # 11
One ppm solution of NaOH Contain 1000 mg of the solute per how much of the volume of the solution.
Choose an answer
1000 mL
100 mL
10 mL
1 mL
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Question # 12
Which of the following is not alloy of aluminium.
Choose an answer
Aluminium bronze
Magnalum
Duralumin
Stellite
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Question # 13
Iodine is a grey black solid and its vapours are in color
Choose an answer
Grey
Black
Yellow
Violet
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Question # 14
The number of formula weight of the solute dissolved per dm3 of the solution is called.
Choose an answer
Mole fraction
Normality
Formality
Molaiity
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Question # 15
In B2H6 molecule
Choose an answer
There exists a direct B-B a -bond
All the atoms are in one plane
All the B-H bonds are normal covalent bonds
There exist two bonds between the boron atoms.
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Question # 16
The reason why phenylamine is a much weaker base tahn ammonia when each is in aqueous solution to that.
Choose an answer
Teh ion pair of electron on two nitrogen atom of phenylamine is delocalised over the benzene ring.
The phenylamine molecule is too large to capture hydrogen ion easily
Phenylamine is much less soluble is water than is ammonia
The benzene ring has a tendency to increase the acidity of its substituents.
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Question # 17
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 # 18
LPG is use this
Choose an answer
Vehicles
Aviation Fuel
Home
All above
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Question # 19
Which of the following dyes belongs to the group of acridine dyes.
Choose an answer
Acriflavin
Alizarin
Indigotin
Cyanine
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Question # 20
Which of the following reactions is employed to produce ozone in the laboratory.
Choose an answer
Exposure of air to UV light
Reaction of F2 with H2O at low temperature
Reaction SO2 with H2O2
Passage of silent electric discharge through oxygen
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Question # 21
SO3 exists in form
Choose an answer
a -so3
b-SO3
gama SO3
All above
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Question # 22
According to CFT the metal ligand bond is considered to be ionic to presentage.
Choose an answer
100%
90%
50%
70%
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Question # 23
What element is the most abundant by mass in the Earth's crust.
Choose an answer
Fe
H
O
K
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Question # 24
The equilibrium constant value for a chemical reaction is 5 x 10
20
which of the following statement is true with respect to this value.
Choose an answer
Reaction will be reversible
Reaction will proceed in backward direction
Reaction is at equilibrium
Reaction will proceed in the forward direction
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Question # 25
Which of the following relation corresponds to Faraday law of electrolysis.
Choose an answer
m = ZI t
E = mc
2
E = ho
None of the above
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Question # 26
Which of the following is not an alkali metal.
Choose an answer
Potassium
Francium
Sodium
Strontium
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Question # 27
Suppose the activatin energy of a certain reaction is 250 kj/mol, If the rate constant at T1 =300 K is k1 and the rate constant at T2= 320 K is ks, then the reaction is ______ times faster at 320 K than at 300 K
Choose an answer
3 x 10
-29
0.067
525
15.0
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Question # 28
Which of the following statements is worng.
Choose an answer
Covalent compounds are generally soluble is polar solvents
Covalent compounds have low melting and boiling point.
Ionic solids do not conduct electricity is solid state
Ionic compounds conduct electricity in the fused state.
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Question # 29
Elements of group 14
Choose an answer
Exhibit oxidation state of -4
Exhibit oxidation state of +4
From M3+ and M4+ ions
Form M4- and M4+ iona
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Question # 30
The vapours attacks the eyes and mucous membrane of nose and throat
Choose an answer
F
Cl
I
Br
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Question # 31
Beillstein test is used for.
Choose an answer
Cl
N2
CO2
Na
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