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Online Tests
PPSC Chemistry Part III Inorganic Chemistry Online Test MCQs With Answers
Question # 1
Which of the following statement is not true for carbon.
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Its forms compounds with multiple bonds
Its ionization energy is very high
It undergoes catanation
It shows inert pair effect
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Question # 2
The different layers in graphite are held together by
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Ionic bonding
Metallic bonding
Covalent bonding
Van der Waals forces
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Question # 3
Boric acid is added to glass because is.
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Makes the glass opalescent
Reduces the coefficient of expansion
Makes the glass brittle
Increase refractive index of the glass.
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Question # 4
Aluminothermy used for on the spot welding of large iron structures is based upon the fact that.
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As compared to iron, aluminium has greatest affinity for oxygen.
As compared to aluminium, iron has greater affinity for oxygen
Reaction between aluminim and oxygen endothermic
Reaction between iron and oxygen is endothermic
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Question # 5
Xenon diflouride is obtained by irradiating a mixture of xenon and fluorine with light from a high pressure.
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Mercury arc
Tungeston arc
Xenon arc
None of above
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Question # 6
The secondary valency of Conc. CoCl3. 6NH3.
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2
4
6
8
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Question # 7
Phosphorus has the oxidation state of +3 in
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Orthophosphoric acid
Hypophosphoric acid
Metaphosphoric acid
Orthophosphorus acid
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Question # 8
According to recent view which is the correct representation of hydrated proton in aqueous solutions.
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H+
H9O3+
H9O4+
H2O+
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Question # 9
Finely divided iron combines with CO to give.
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Fe(CO)5
Fe2(CO)9
Fe(CO)12
Fe(CO)6
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Question # 10
The oxidation state shown by phosphorus is.
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- 3
+ 3
+ 3 and +5
-3 ,+ 3 and +5
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Question # 11
Which of the following elements is most electropositive.
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C
N
O
Be
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Question # 12
When borax is strongly hented, it gives
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B2O4
Na2B4O7
NaBO2
NaBO2 + B2O3
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Question # 13
Which of tetra chloride is resistant to hydrolysis.
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CCl4
SiCl4
GeCl4
SnCl4
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Question # 14
Which one of the following oxides is basic.
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MnO
Mn2O3
MnO2
Mn2O7
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Question # 15
The most reactive alkali metal among the following is
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Li
Na
Cs
Rb
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Question # 16
Arrhenius concept explained
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Constant heat of neutralization
Quantitative determination of acid base strength
Catalytic property of acid
All above
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Question # 17
Sodium metal cannot be stored under
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Hexane
Benzene
Kerosene
Ethanol
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Question # 18
Xenon reacts best with
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The most electropositive elements
The most electronegative elements
The hydrogen halides
Non metals
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Question # 19
The elements with highest electron affinity belongs to.
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Period 2 , group 17
Period 3, group 17
Period 2, group 18
Period, 2 , group 1
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Question # 20
On industrial scale chlorine is prepared by
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Dennis method
Deacon's process
Plantner's process
Aludels process
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Question # 21
SO2 acts as
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Lewis base
Lewis acid
Botha A and B
None of above
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