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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Which of the following technique is used for separation of volatile components.
Choose an answer
GC
HPLC
FPLC
TLC
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Question # 2
The stationary and mobile phases in paper chromatography are.
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Liquid/Liquid
Solid /Liquid
Liquid/Solid
Gas/solid
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Question # 3
Radon is obtained only in the radioactive decay of
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Radium
Thorium
Actinium
Any of above
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Question # 4
Which is the correct configuration of Fe3+ (Z= 26)?
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[Ar] 4s
2
, 3d
6
[Ar] 4s
2
, 4d
5
[Ar] 3d
5
None of these
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Question # 5
Helium is used for
Choose an answer
The preservation of food
Filling electrical transformer
Pressuring agent in rockets
All of above
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Question # 6
Copper occurs in nature as.
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Native
Combined
Both native and combined
None of the above
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Question # 7
The unequal sharing of bonded pair of electrons between the two atoms in a molecule causes.
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Dipole
Radical formation
Decomposition of found
Covalent found
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Question # 8
In German Silver copper is alloyed with which metal.
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Zn
Ni
Ai
Zn and Ni
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Question # 9
A property which gradually increases on moving down group in the periodic table is
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Ionization enthalpy
Elemtronegativity
Electron affinity
atomic size
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Question # 10
Which of the following statement is not true with respect to the role of matter undergoing decomposition.
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Decomposed matter increase soil fertility
They provide a texture which is favorable for plant growth
Organic compounds for complexes with mineral nutrients which enhance uptake by plants.
In high concentration the decomposition product may increase the photosynthesis
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Question # 11
Which of the following statement is not correct regarding Lewis acids and bases.
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NH3 and H2O both behaves as Lewis bases
Substances which donate a pair of electrons are called Lewis bases
All Lewis bases are also Bronsted bases
Lewis base must contain an atom having less than an octet of electron.
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Question # 12
Dibornae is used
Choose an answer
Fro high energy fuel
For welding torches
as reducing agent
All above
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Question # 13
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 # 14
In Dannis's method the end of the copper caps into which graphite electrode are fixed with cement.
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Portiant
Bakelite
Asbestos
All of above
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Question # 15
Which of the following statement is not related with direct use of solar energy.
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It is used for space heating of buildings
It can be used to produce electrical power using photovoltaic cells
It can be used to produce hydrogen gas
It can be used start motor vehicle
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Question # 16
Conjugation of chromophore
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Deepens the colour
Lightene the colour
Shifts absorption to shorter wavelength
All of these
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Question # 17
The width of a carbon nano tube is.________ nm
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1
1.3
2.5
10
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Question # 18
Which of the following devoice is used to measure potential difference between celctrodes.
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Polarimetre
Conductometer
Voltmeter
Photometer
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Question # 19
Which of the following range is correct for macro analysis.
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Minimum 100 mg
Minimum 10 mg
Minimum 1 mg
Minimum 1000 mg
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Question # 20
Which of the following is the third most abundant element in the nature.
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Oxygen
Sulphur
Aluminum
Hydrogen
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Question # 21
_________ is preferred for horticultural crops and for tobacco and potatoes.
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Potassium Chloride
Potassium Sulphate
Potassium NItrate
None of these
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Question # 22
Which of the following allows charge transfer through the solution but prevents mixing of the solution.
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Anode
Cathode
Electrode cell
Salt bridge
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Question # 23
Which of the following statements do not represent Lewis idea of acids and base?
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Compounds which have completely filled orbitals
Compounds which have incompletely filled orbitals
Compounds in which the central atom can expand its octel
All simple metal ions like Ag+, Al3+ etc.
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Question # 24
Chlorofluorocarbon are widely used as coolants in.
Choose an answer
Air conditioners
Clearing solvents
Aerosol propellant's
All above
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Question # 25
Beillstein test is used for.
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Cl
N2
CO2
Na
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Question # 26
Which of the following term refers to nearness between several measurements of the same quantity.
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Accuracy
Precision
Standard error
Standard error of mean
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Question # 27
What element constitutes the major component of most bronzes.
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Tin
Zinc
Carbon
Aluminum
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Question # 28
Group IV A consist elements.
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3
4
5
6
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Question # 29
How much amount of NaOH is required to prepare 100 mL of 1 N solution.
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80 g
4 g
40 g
zero
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Question # 30
What nickel alloy has high electrical and corrosion resistance and high strength at red heat temperature and contain 15 to 20% chromium.
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Alnico
Nichrome
Invar
None of above
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Question # 31
Glass was first made by about________
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40 BC
400 BC
4000 BC
100 BC
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