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Online Tests
PPSC Chemistry Part III Inorganic Chemistry Online Test MCQs With Answers
Question # 1
Which of the following is an allotrops of hydrogen.
Choose an answer
0- H2
P-H2
Both A and B
None of these
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Question # 2
Which of the following statements about anhydrous aluminium chloride is correct.
Choose an answer
It exist as AlCl3 molecules
It is not easily hydrolysed
It sublimes at 100
o
C under vacuum
Boron does not form B
3+
ions
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Question # 3
On hybridization of one s and one p orbitals we get.
Choose an answer
Two mutualy perpendicular orbitals
Two orbitals at 180
o
Four orbitals directed tetrahedrally
Three orbitals in a plane
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Question # 4
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 # 5
A trend which is common to elements of both the group IA and group VII A ongoing from top to bottom.
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Boiling point increases
Electron affinity increases
Oxidizing power increases
Ionization energy decrease
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Question # 6
What % if nickel is present in the major ore Pentlandite.
Choose an answer
22%
18%
14%
10%
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Question # 7
Which of the following is the third most abundant element in the nature.
Choose an answer
Oxygen
Sulphur
Aluminum
Hydrogen
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Question # 8
Which pair of species can undergo chemical reaction with each other.
Choose an answer
CO+ NO
LiH and H2O
CO2 and HCl
CaH2 and SI H4
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Question # 9
Which one of the following noble gas is obtained by radioactive disintegrastion
Choose an answer
Kr
Br
Rn
Xe
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Question # 10
Phosphoric acid is the most important of the phosphorus oxy acids. Industrially phosphoric acid is prepared by.
Choose an answer
The Ostwald process
The Haber's process
The reaction of phosphate rock with sulphuric acid
The reaction P4O10 with water.
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Question # 11
The three dimensional silicate anion (Si2O5
2-
)n is present in
Choose an answer
Beryl
Silica
Asbestos
Clays
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Question # 12
Al Cl3 is used in
Choose an answer
Manufacturing of petrol
In borax bead test
Prezervation of food
All above
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Question # 13
Boron does not form B3+ ion because.
Choose an answer
It has small size and high ionization energy
It has high electromagnetically
It has high charge density
None of the above
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Question # 14
Are used as water repellents
Choose an answer
Carbides
Silicon
Silicones
Silicates
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Question # 15
LiAIH4 is most useful reducing agent It reduce to alcohol
Choose an answer
Aldehydes
Ketone
Carboxylic acid
Any of above
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Question # 16
Which property is not exhibited by carbon in its compounds.
Choose an answer
Forming bounds to other carbon atoms
Formation multiple forms
Exhibiting allotropic forms
Forming compounds with coordination number beyond four
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Question # 17
In graph of atomic volume versus atomic weight the elements corresponding to peaks in the curve belong to.
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Group 1
Group 18
Group 4
Group 14
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Question # 18
The basic strength of hydrides of group 15 elements very in the following order.
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NH3 > PH3 > AsH3 > SbH3 >BiH3
PH3 > NH3 > AsH3> SbH3 > BiH3
BiH3> NH3 >PH3 > AsH3 > SbH3
NH3 > PH3 > SbH3 > AsH3 > BiH3
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Question # 19
The penultimate shell of carbon contains electrons.
Choose an answer
s2
s2p6
s2p6d10
s2p6d8
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Question # 20
Transition elements, in general exhibit the following properties, except one Name that property.
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Variable oxidation state
Natural radioactivity
Tendency to form complexes
Formation of alloys
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Question # 21
If the absorbed light is green the transmitted light will be
Choose an answer
Purple
Orange
Violet
Black
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