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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
The common temperature detecting device in DTA are.
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Thermocouples
Thermopiles
Thermistore
All
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Question # 2
The percentage of nitrogen in ammonia is _______________%
Choose an answer
32
82
25
55
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Question # 3
The stabilization of the dispersed phase in a lyophobic sol is due to
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Liking for the dispersion medium
The surface tension of the medium
The formation of an electrical layer between the two phases
The viscosity of the medium
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Question # 4
Poise is a unit of.
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Refractive index
Optical activity
Fluidity
Viscosity
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Question # 5
A general trend in the properties of elements of carbon family shows that with increase in atomic number.
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The tendency towards concatenation increases
The tendency to show +2 oxidation state increase
Metallic character decreases
The tendency to form complexes with convalency higher than four decreases.
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Question # 6
The multiplicity of the electronic state is equal to.
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S + 1
2S + 1
2S - 2
2S + 2
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Question # 7
Which of the following is capable of forming zwitter ion.
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Amino acids
Halo acids
Hydroxy acids
All of these
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Question # 8
The following alloys are the chief alloys that are die cast except.
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Zinc alloys
Magnesium alloys
Manganese alloys
Nickel alloys
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Question # 9
Which of the following is the statement of third law of thermodynamics.
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Entroy of perfectly crystalline substance is zero at T = 0
Entropy of a perfectly crystaline substance is zero at standard state conditions
Entropy and enthalpy of a substance become equal at T = 0
Free energy of a crystalline substance is zero at T = 0
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Question # 10
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 # 11
When a concentrated solute of an electrolyte is diluted.
Choose an answer
Its specific conductance increases
Its equivalent conductance decreases
The specific conductance decreases and equivalent conductance increases
Both specific and equivalent conductance increase
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Question # 12
Which of the following statement is not correct with respect to harmful effects of ground water pollution.
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It causes lungs cancer
It causes jaundice
It damages crops
It helps to prevent epidermises
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Question # 13
H-Bonding also ox in ling system like
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Protein
DNA
Botha A and B
None of above
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Question # 14
Which of the following disposal method is used for agriculture wastes.
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Dump
Landfill
Incineration
Open burning
All above
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Question # 15
Which of the following statement is not related to MOT
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Atomic orbitals lose their identities
MOTgives as idea of denationalization
MOT uses all the orbitals and elections
It treated bond as purely covalent
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Question # 16
Which of the following quantity is correct for micro analysis.
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1 -10 mg or < 50 ml
10-20 mg or > 50 mL
50-100 mg or < 100 mL
None of above
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Question # 17
Iso-osmotic solutions are those which have the same.
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Vapour pressure lowering
Osmotic pressure
Molality
Boiling point elevation
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Question # 18
Which of the following molecules can oxhibit geometrical isomerism.
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CH3CH = CH2
CH3CH = CHCH3
(CH3)2 C = CH2
CH3CH = C(CH3)2
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Question # 19
Which of the following expressions represent the equivalent conductance.
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A = l s x 1000/V
A = Ls x 1000/C
A = Ls l/A
A = Ls/V
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Question # 20
Which of the following process is not involved in the purification of bauxite.
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Bayer's process
Serpek's process
Hall's process
Goldsmith's process
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Question # 21
In which polymerization branching of chain cannot be possible.
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Free radical
Cationic
Anionic
Anionic and Zieglar Natta
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Question # 22
Which of the following is an azo dye.
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Congo red
Rhodamine B
Ertythroein
Paraosaniline
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Question # 23
Which of the following statement is not related with environmental pollution.
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Direct or indirect change in any component of the biosphere
Undesirable change in the physical characteristics of the air
Undesirables change in the biological characteristics of the soil
not affecting adversely the industrial progress
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Question # 24
Temporary hard water is softened on industrial scale by adding.
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Mg(OH)2
Ca(OH)2
KOH
NaOH
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Question # 25
Which of the following solution has highest normality.
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1 N H2PO4
0.5 N H2SO4
6 g NaOH per 100 cm3
4 g NaOH PER 1000 cm3
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Question # 26
The carbonate of which of the following will have highest lattice energy.
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Barium
Magnesium
Calcium
Strontium
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Question # 27
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 # 28
Reacts violently with water
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AlH3
AlCl3
Lia IH4
Al2Cl6
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Question # 29
The minimum amount of energy that the reacting molecules must posses at the time of collations in under to produce effective collisions is called.
Choose an answer
Free energy
Threshold energy
Activation energy
External energy
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Question # 30
When a solute is dissolved in two immiscible solvents it will distributes itself between two phases and the ratio of the concentration of the solute in two phases will be constant, This is known as.
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Starke law
Distribution law
Equilibrium law
Snell's law
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Question # 31
Which of the following process involves the use fo organic compound as an electron acceptor.
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Aerobic respiration
Anaerobic respiration
Fermentation
Glycolsis
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