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Online Tests
PPSC Chemistry Part III Inorganic Chemistry Online Test MCQs With Answers
Question # 1
Which of the following pentahalides is not formed.
Choose an answer
NF5
PF5
AsF5
BiF5
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Question # 2
Shows a regular increase on moving down the group form carbon to lead
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Atomic volume
Atomic radius
Density
All above
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Question # 3
The bond order for BO molecule is.
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2.5
3.0
2.0
3.5
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Question # 4
Fluorine is.
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Powerful oxidizing agent
Most reactive element
Used as refrigerants
All of above
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Question # 5
Iodine is a grey black solid and its vapours are in color
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Grey
Black
Yellow
Violet
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Question # 6
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 # 7
Which one of the following ionsis colourless.
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Cu+
Ni2+
Co2+
Fe3+
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Question # 8
Which of the following is most soluble in water
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CaSO4
Sr SO4
MgSO4
BaSO4
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Question # 9
The principal ores of copper are
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Copper sulphides
Copper oxides
Both sulphides and oxides
Copper carbonate
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Question # 10
The most electronegative element of the third period is.
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F
P
Br
Cl
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Question # 11
The force responsible for dissolution of ionic compounds in water are
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Hydrogen bonds
Ion dipole forces
Ionic bonds
Van Der Waal forces
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Question # 12
The correct order of second ionization potential of carbon nitrogen, oxygen and fluorine is.
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C > N > O > F
O > F > N > C
O > N > F > C
F > O > N > C
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Question # 13
Pick out the incorrect statements for transition metals.
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They have low melting and boiling points
5d-element have higher energies than 3d or 4 d elements
Zr and Hf have almost identical atomic and ionic radii
They form interstitial compounds.
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Question # 14
In the metallurgy of iron, when limestone is added to the blast furnace, the calcium ion ends up in.
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Slag
Gangue
Metallic calcium
Calcium carbonate
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Question # 15
Which of the following elements would have the lowest first ionization energy
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Mg
Rb
Li
Ca
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Question # 16
The interactions in HF are.
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dipole dipole interasctions
Hydrogen bonds
dipole -dipole and dispersion forces
Hydrogen bond and diapersin forces
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Question # 17
Aque regia is made by dissolving a mixture of HNO3 and HCl with ratio.
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1 : 1
1 : 3
1 : 2
1 :10
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Question # 18
The specific gravity of H2SO4 is
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1.37
1.84
1.17
1.57
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Question # 19
Which of the following compounds has highest boiling point.
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HI
HF
HBr
HCl
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Question # 20
Which of the following elements with excess oxygen to form proxides.
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Ca
Mg
Li
Ba
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Question # 21
Used in filling luminous tubes.
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Xenon
Krypton
Radon
Helium
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