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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
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 # 2
Which of the halogens has lowest bond energy.
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Cl2
Br2
F2
I2
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Question # 3
The common host compound for the formation of inclusion compound is.
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Urea
Thiourea
Cholic acid
All above
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Question # 4
Which of the following linear polymer.
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Polypeptide
Protein
Starch
Phenol formaldehyde resin
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Question # 5
Sodium reacts with excess of oxygen to form
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Na2O
NaO2
Na2O2
NaO
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Question # 6
The atomic number of Potassium is 19 and that of manganese is 25. Although the coloured of MnO4 is dark violet yet the K+ is colourles.. This is due to the fact that
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Mn is a transition element while K+ is not
[MnO4]is negatively charged while K+ has a positive charge
The effective atomicnumebr of Mn is [MnO4] is 26 while for K+ the atomic number is 18
The Mn in a high positive oxidation state allows charge transfer transitions
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Question # 7
Nitrogen (N2)) is relatively unreactive because.
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Its electronegativity is high
Its dissociation energy is large
Its atomic radius is small
It is the first element of group 15
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Question # 8
Homolytic fission of convalent bond results in the formation of.
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Free redicals
Carbocations
Carbonions
Both B and C
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Question # 9
Metal crystallize is system having co ordination number
Choose an answer
8
12
14
any one of above
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Question # 10
How many varieties of commercial iron are known.
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1
2
4
3
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Question # 11
What element is added to copper to make it extremely hard.
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Aluminum
Zinc
Lead
Tin
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Question # 12
Which of the following is not a component of hollow cathode lamp.
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Anode
Cathode
Filter gas
Atomic vapour
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Question # 13
Which of the following techniques involves the distribution of solute between two immiscible liquid phases.
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Chromatography
Electrophoresis
Solvent extractions
Solid phase extraction
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Question # 14
Which of the following a -amino acid is not capable of exhibiting optical isomerism.
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Glycine
Leucine
Arginine
Alanine
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Question # 15
The capacity of normal human eye to see the smallest object is _______ micro meter
Choose an answer
10000
1000
100
10
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Question # 16
For highly paraffine , crude oil, the characterization factor will be in range of
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11.5-12.5
12.5-13.0
13.5-14.0
13.4-15.0
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Question # 17
The emission of light in a biological reaction in known as.
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Fluorencence
Phosphoreacence
Biolumineacence
Phtolysis
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Question # 18
The rate of a chemical reaction is proportional to the product of the active mean of the reactants, This is a statement of.
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Law of dynamic equilibrium
Le Chatlier's principle
Law of mass action
Solubility product principle
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Question # 19
During the last two centuries, the atmospheric CO2 contents are increased by
Choose an answer
15%
25%
35%
50%
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Question # 20
Molecule of oxygen is
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Diamagnetic
Paramagnetic
Both A and B
None of above
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Question # 21
Which of the following statement is false about resonance.
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It increase the stability of a molecule
It leads to similar type of bonds
It increase the reactivity of the molecule
It decrease the reactivity of the molecule.
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Question # 22
Potassium crystallizes in a body centered lattice. Hence, the coordination number of potassium in potassium metal is.
Choose an answer
4
6
8
12
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Question # 23
Ferrochrum contains Cr up to
Choose an answer
60-70%
70-80%
80-90%
40-50%
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Question # 24
The by -product of the process of saponification is.
Choose an answer
Methanol
Glycol
Glycerol
Absolute alcohol
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Question # 25
Which of the following statement is not true is case of catalytic reforming.
Choose an answer
Dehydrogenations high endothermic
Dehydrogenation is exothermic
Hydrodealkylation reactions are endothermic
None of these
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Question # 26
The ionization energy of N is more than that of oxygen becasue.
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Nitrogen has half filled p orbitals
Nitrogen atom is smaller in size than oxygen atom
Nitrogen contains less number of electrons
Nitrogen is less electronegative
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Question # 27
The splitting of H2O can be carried out through
Choose an answer
Photolysis
Electrolysis
Dialysis
Hydrogenation
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Question # 28
The lowest K.E. for an electron is three dime national cubic box is given by
Choose an answer
h
2
/ 8m
a
3h
2
/ 8 ma
2
9h
2
/ 8ma
2
16h
2
/ 8ma
2
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Question # 29
The equivalent conductance of a 1 N solution of an electrolyte is nearly
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The same as its specific conductance
10
3
times more than its specific conductance
10-3 times its specific conductance
100 times its specific conductance.
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Question # 30
The process of extracting a metal in pure form its ores is known as.
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Crushing
Grinding
Dressing
Metallurgy
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Question # 31
Maximum desirable concentration of fluorides according to international standard is.
Choose an answer
10-100 ppm
1 ppm
100-200 ppm
10-20 ppm
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