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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Hemimorphite is an example of.
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Orthosilicate
Pyrosilicate
Cyclic silicate
Meta silicate
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Question # 2
The oxidation state of HCiO4
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+ 7
+ 3
+ 5
+ 1
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Question # 3
Which of the following pairs does not represent Lowery acid base pair.
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H2O+NH3
H2O +H2O
HCL + H2O
CH3NH2 + BF3
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Question # 4
Which of the following is not an ore of nickel.
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Pentalandite
Siderite
Garnierite
Nicollite
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Question # 5
The hybridization of S in SO2 is.
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sp
sp2
sp3
dsp2
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Question # 6
Which of the following is not true for metalloids.
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They are borderline elements
They usually act as electron during with non metals.
B, Si, and Ge
They are all solids at room temperature.
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Question # 7
The second order rate constant can have units.
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dm-6 mol 2 s-1
dm3 mol s-1
dm
3
mol
-1
s
-1
dm6 mol-1 s-1
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Question # 8
Oxidation state of the chromium [Cr(NH3)6]3+ complex ion is
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+2
+3
+4
+5
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Question # 9
Which of the following case of acid or base strength is not explained by inductive effect.
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Formic acid> acetic acid
Dimethyl amine > trimethyl amine
Dimethyl amine > methyl amine
Chloroacetic acid > acetic acid
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Question # 10
1 meter = ___________ nm
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10
9
10
-9
10
10
10
-10
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Question # 11
Which of the following pollutant is generated from combustion of fuel.
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Smoke
SO2
CO2
Metallic oxides
All above
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Question # 12
When of the following steps is involved in structure determination of an organic compound.
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Purification of compund.
Qualitative and quantitative analysis of elements present
Determination of molar mass
All above steps
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Question # 13
Usually the rate of the reactions is expressed as.
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mol dm-1
mol dm-3 s-1
mol dm-2 s-1
mol 2 dm-3 s-1
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Question # 14
Pick out the incorrect statement
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The geometry around 'N' atom in trimethylamine is pyramidal
The geometry around N atom in trisilylamine is planar
The nitrogen atim is trimethylamine is sp2 hybridized whilst in trisilylamine it is sp2 hybridized
Trisilylamine has donor properties whilst trimethylamine has no donor properties.
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Question # 15
Which of the following is NOT true 7 ceramic materials are.
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Hard, have high densities high compressive strength and very good thermal resistance and strength at higher temperature Silicon
Hard, have low densities high compressive strength and very good thermal resistance and strength at higher temperature.
Hard, have low densities low compressive strength and very good thermal resistance and strength at higher temperature.
Hard, have low densities' high compressive strength and very good thermal resistance and strength at higher temperature.
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Question # 16
Helium is used in weather balloons and airships instead of H2 becuse it is.
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Lighter than hydrogen
Incombustible
More abundant than hydrogen
Radiactive
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Question # 17
The process in which ore is heated generally in the presence of air, at temperature below their melting points is called.
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Calcination
Roasting
Fourth floatation
besemerization
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Question # 18
The principle former of almost all glasses is
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(SIO2)n
(SiO3)n
(SiO2)
None of these
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Question # 19
In statistical mechanics, there exists a function which contains all the information about a macroscopic system. This function is known as.
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Eigen function
Wave function
Partition function
Distribution function
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Question # 20
Polyamide jinkage is present in
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Nylon
Silk
Protein
All of these
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Question # 21
Setting of cement is improved by
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Lime stone
Clay
Gypsum
Water
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Question # 22
The process requirieng the absorption of energy of.
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F = F
Cl = Cl
H = H
O = O
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Question # 23
Which one of the following is not correct.
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Ar is used in electric bulbs
Kr is obtained during radioactive decay
Boiling point of H2 is lowest among all noble gases.
Xe forms Xe OF4
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Question # 24
Which is the second most abundant element occurring the earth crust.
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Iron
Cu
Cr
Ni
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Question # 25
Rotary spinning process is used to produce
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Glass wool
Optical fibre
Glass marble
None of above
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Question # 26
Blue color of glass of due to the presence of .
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Cobalt (II)
Chromium (III)
Iron (III)
copper (II)
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Question # 27
A terpenoid which has as alcoholic group in the molecule is.
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Citral
Camphor
Menthol
Carvone
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Question # 28
The Hall process involves the reduction of Al2O3 to aluminium by
Choose an answer
Carbon
Carbon monoxide
Molecular hydrogen
Electrolysis
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Question # 29
BCl3 is a planar molecule because B atom is.
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sp2 hybridized
Sp3 hybridized
sp hybridzed
sp3 d hybridized
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Question # 30
Human hearing is sensitive to frequency in the range of about
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10,000 - 20,000 Hz
10 - 10,000 Hz
16- 20,000 Hz
None of the above
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Question # 31
Drained sewage has B.O.D.
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More than that of water
Less than that of water
Equal to that of water
None of the above
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