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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Cement containing higher percentage of gypsum than required.
Choose an answer
Sets slowly
Sets repidly
Does not set at all
Has no effect
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Question # 2
The process in which ore is heated generally in the absence of air, to expel water from a hydrated oxide at temperature below their melting points is called.
Choose an answer
calcination
Roasting
Froth floatation
Bessemerization
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Question # 3
Which of the following elements has the highest value of IE.
Choose an answer
Na
K
Mg
Ca
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Question # 4
Which of the following give higher fibre strength.
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Eucalyptus
Pine
Bagnasse
Sugar cane
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Question # 5
Which element amongst the following has the highest boiling point.
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Na
Mg
Ca
K
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Question # 6
Each of the following compound is an aromatic except.
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Benzene
Naphthalene
Cyclopentadienyl cation
Cyclopentadienyl anion
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Question # 7
Peppermint oil contains.
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Menthol
Thymol
a-pinene
Comphene
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Question # 8
Which of the following technique in current voltage technique
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Amperometry
Voltammetry
Poteatiomertry
Polarography
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Question # 9
A system which can exchange energy as well as natter with its surrounding is said to be a/an
Choose an answer
Closed system
Inert system
Open system
All of above
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Question # 10
Pick out the incorrect statement for XeF4
Choose an answer
XeF4 disproportionate violently with water
It is used as fluorinating agent
It has octahedral structure for geometry
It oxidizes I to I
2
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Question # 11
Which of the following is component of the ecosystem.
Choose an answer
Inorganic substances
ORGANIC Substances
Animal and plants only
All above
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Question # 12
Setting of plaster of Paris volves.
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Oxidation with atmospheric oxygen
Combination with atmosphere CO2
Dehydration
Hydration to yield another hydrate
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Question # 13
Which of the following device is used to measure the surface tension.
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Polarimeter
Viscometer
Refractometer
Stalagnameter
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Question # 14
The relative error is usually expressed as
Choose an answer
Parts per ten
Parts per one
Parts per hundred
Botha C and D
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Question # 15
The rate constant for 3rd order reaction has the dimentions of.
Choose an answer
mol-2 s-1
I2 mol-2 s-1
mol I -1 s-1
I-1 mol -1 s-1
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Question # 16
An stereospecific enzyme in one which catalyses
Choose an answer
Formation of one stercolsomer
Reaction of one stereoisomer only
Both of these
None of these
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Question # 17
Ozone layer of upper atmosphere is being destroyed by
Choose an answer
chlorofluorocarbons
SO2
Photochemical oxidants O2 and CO2
Smog
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Question # 18
The size of nanoparticles is between __________ nm
Choose an answer
100 to 1000
1 to 100
0.1 to 10
0.01 to 1
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Question # 19
A terpenoid which has as alcoholic group in the molecule is.
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Citral
Camphor
Menthol
Carvone
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Question # 20
The isoelectric point of a protein or amino acid to.
Choose an answer
pH at which it does not have any charge
pH at which it does not have not charge and does not migrate in electric field
pH at which the concentration of cation is greater than amino
pH at which the concentration of anion is greater than cation
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Question # 21
SAN is a polymer of
Choose an answer
Styrene
Acrylonitrile
Both A and B
Vinyl chloride
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Question # 22
Which of the following is not a colligative property.
Choose an answer
Elevation of B.P.
Depresaion in F.P
Viscosity
Osmotic pressure
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Question # 23
During the preparation of soap the liquid separated by distillation is
Choose an answer
Sodium hydroxide
Oil
Fats
Glycerol
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Question # 24
The number of moles of solute dissolved in 1000 gram of the solvent is called
Choose an answer
Formality
Molality
Molarity
Mole fraction
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Question # 25
pH of pure water at 25
o
C. kw = 1 x 10
-4
Choose an answer
0
7
14
None of above
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Question # 26
An indicator for an acid base titration is a
Choose an answer
Weak acid
Weak base
Strong acid
Strong base
Both A and B
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Question # 27
Most commercial glasses consist of
Choose an answer
Lime
Soda
Silica
All
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Question # 28
According to CFT the metal ligand bond is considered to be ionic to presentage.
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100%
90%
50%
70%
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Question # 29
Which of the following statements correct regarding copper.
Choose an answer
It is used in electroplating
Its salts are used as insecticides
Its salts are used as coloring materials
All are correct
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Question # 30
Ozone layer of stratosphere requires protection from indiscriminate use of.
Choose an answer
Fungicides, insecticides, bactericides and medicines
Aerosols and high flying jets
Atomic explosions and industrial wastes
Weather ballons
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Question # 31
Which of the following is a false statement.
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Halogens are strong oxidizing agent
Halogens show only (-I) Oxidation state
Hf molecules from intermolecular H-Bonds
Fluorine is highly reactive
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