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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Buffer solution are used to.
Choose an answer
Increase the pH
Resist the pH
Decrease the pH
None of above
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Question # 2
Hydrocarbon X (C6H12) on oxidation with hot alkaline (KMnO4) gives a mixture of prop ionic acid and dimethyl ketone. The structure of compound X is
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CH3CH = CHCH2CH2CH3
(CH3)2 C = CH CH2 CH3
CH3CH2CH = CHCH2CH3
(CH3)2 C = C (CH3)2
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Question # 3
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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Question # 4
When propyne is treated with equeous H2SO4 in the presence of HgSO4 the functional isomer of the major product obtained in.
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Propanal
Acetone
Propane 2 -nl
Propanol
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Question # 5
The green colour of glass is due to the presence of.
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Chromium (III)
Cobalt (II)
Mn (IV)
Iron(III)
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Question # 6
A minor constant is one whose amount in the sample is
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0.1 to 1 %
0.01 to 1%
1 to 10%
None of the above
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Question # 7
Which of the following techniques is used to reduce the need for large volumes of organic solvents.
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Solid phase extraction
Gel permeation
Electrophoresis
TLC
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Question # 8
The chemical method of separation in which the analytes to be separated are distributed between two phases, one of which is stationary phase while the other moves in a definite direction This technique is known as.
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Electrophoreals
Chromatography
Solvent extraction
Catachreals
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Question # 9
Co enzyme cna be separated from enzyme by
Choose an answer
Precipitation
Dalysis
Hydrolysis
Distillation
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Question # 10
Monomer of natural rubber is
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1,3-Butadiene
2-Methyl -1,3-butadiene
1,2 -Butadiene
1,3 - Pentadiene
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Question # 11
The number of hydrogen bonds boding A _____ T pair is
Choose an answer
1
2
3
4
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Question # 12
The inert gases Ar, Kr and Ke form compounds with water at low temperature and high pressure. These compounds are called.
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Halides
Hydrates
Clathrates
All of above
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Question # 13
Which of the following equations represent linear free energy relationship.
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Hammett equation
Taft equation
Helmholtz equation
Differential equation
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Question # 14
Which property is not exhibited by carbon in its compounds.
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Forming bounds to other carbon atoms
Formation multiple forms
Exhibiting allotropic forms
Forming compounds with coordination number beyond four
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Question # 15
The deficiency of which vitamin leads to beri brainteaser
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Thiamine
Riboflavin
Pyridoxine
Asorbic acid
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Question # 16
How many stereoisomers are possible for CH3CH = CHCHCH(Br) CH3
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2- geometrical isomers
2- optical isomers
2- geometricla nad 2- optical isomers
2- geometrical and 1 optical isomers
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Question # 17
Lactic acid is a molecule which shows
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Epimersim
Tautomerism
Opical isomerism
Metamerism
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Question # 18
Which of the following is raw material not present on the cement.
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Lime stone
Gypsum
Red lead
Blast furnace slag
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Question # 19
NH3 has a not dipole moment while BF3 has zero dipole moment Thsi is because.
Choose an answer
NH3 is not a planar molecule while BF3 is a planar molecule.
NH3 is a planar molecule, while BF3 is a planner molecule.
Fluorine is more electronetative than nitrogen
Born is more electronegative than nitrogen
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Question # 20
Which treatment is done with pulp before delivering it to paper making machine.
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Pulp is disperse din water to make slurry
Mechanical refining or heating of the fibers
Addition of chemical additives and recycled fibres from the waste paper plant
All above
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Question # 21
Helium contents in the atmosphere by volume.
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0.0005%
0.0015%
0.0001%
0.00001%
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Question # 22
Which of the following statement is not correct regarding galvanic cells.
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Oxidation occurs at the anode
Ions carry current inside the cell
Electrons flow around the external circuit. form cathode to anode
When the e.m.f. of the cell is positive cell reactionis spontaneous
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Question # 23
Which of the following technique is useful to remove metal ions from an interfering matrix.
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Solvent extraction
Electrophorests
Cataphorests
Gel permeation
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Question # 24
The one which is not a purine base
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Cytosine
Guanine
None of these
Adenine
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Question # 25
The sugar present in RNA is
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D- ribose
D-Arabinose
D-Glucose
Deoxyribose
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Question # 26
Which of the following compounds is must acdic.
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H2O
H2S
H2Se
H2Te
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Question # 27
Which of the following electrode is normally used as reference electrode for a potentiometer.
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Platinum electrode
Calomel electrrode
Silver electrode
Copper electrode
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Question # 28
Which of the following compounds would you use in order to obtain a crystalline derivative of an aromatic amine.
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2,4 Dinitrophenyl hydrazine
Nitrous acid
Benzoyl chlride
None of these
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Question # 29
A well packed column may hve
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100 plates /m
1000 plates /m
10 plates /m
10,000 plates/m
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Question # 30
Which one of following is non polar
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CH2Cl2
CCl4
CHCl3
CH3Cl
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Question # 31
The noble gas used or treatment of cancer is
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Helium
Argon
Radon
Krypton
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