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PPSC Chemistry Part III Inorganic Chemistry Online Test MCQs With Answers
Question # 1
Acid rain effects
Choose an answer
Human being
Crops
Aquatic life
All above
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Question # 2
Which of the following pentahalides is not formed.
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NF5
PF5
AsF5
BiF5
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Question # 3
CIF is
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Chlorine monoflouride
Fluourine
Monochlorine fluoride
Monofluorine chloride
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Question # 4
According to the VSEPR theory, the shape of the SO3 molecule is.
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Pyramidal
Tetrahedral
Trigonal planar
Distorted totrahedron
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Question # 5
Glass electrode cannot be used to measure the pH of pure.
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Acetic acid
Ethyl alcohol
Gelatin
All above
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Question # 6
Flourine differs from the other members of its own group due to.
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Its small size and low bond energy
Its higher electornegativity
None-availability of d-orbitals in its valence shell
All the above
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Question # 7
Pick out the incorrect statement about K2Cr2O7
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It is thermally stable
It dissolves in alkali to form chromate
It oxidizes acidified FeSO4 solution to Fe2(SO4)3
It is used as cleansing agent for glassware, etc. when mixed wiht cold conc. H2SO4
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Question # 8
In smelting process the ore is mixed with
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Silica
Coke
Limestone
All
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Question # 9
A thionic acid
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H2S2O3
H2S2O6
H2S2O8
H2S2O7
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Question # 10
The bond order for BO molecule is.
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2.5
3.0
2.0
3.5
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Question # 11
Gases and dust particles are removed from H2SO4 by
Choose an answer
Tydal effect
Drying tower
Absorption tower
Contact converter
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Question # 12
Which of the following has the highest melting poing.
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NaCl
Li Cl
KCl
Rb Cl
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Question # 13
In their ionic compounds halogens exhinit the oxidation states of.
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-1
-2
-3
-4
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Question # 14
Inert pair effect is that
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When an element shows incertness in chemical combination
When higher oxidation state is more stable than lower oxidation state
When an elecrron pair is present on the atom of an element
When two s -electrons or outermost shell remain paired and do not participate in bonding.
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Question # 15
Finely divided iorn combines with CO to give
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Fe(CO)3
Fe2 (CO)9
F33(CO)12
Fe(CO)6
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Question # 16
Which of the following halide has lowest melting point.
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NaCl
NaF
NaBr
NaI
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Question # 17
The aluminium alloy used to make parts of aircrafts is.
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Magnalium
Aluminium bronze
Duralumin
All of the these
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Question # 18
Electron affinities of halogens are in the order.
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F > Cl > Br > I
Cl > F > Br > I
Cl > Br > I > F
Cl > Br > F > I
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Question # 19
Which of the following statements is false about transition metals.
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They form complexes
They show variable valency
All transition metal compounds are paramagnetic
They form coloured ions
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Question # 20
Molten iron withdrawn from the blast furnace is called.
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Wrought iron
Pig iron
Bessemer iron
Stainless steel
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Question # 21
The wire of flash bulb is made up of.
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Cu
Ag
Mg
Ba
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