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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
A unit cell having dimension , a = b c, alpha, beta, gama = 90
o
is known as.
Choose an answer
Cubic
Hexagonal
Orthorhombic
None of them
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Question # 2
Which of the following statements is wrong.
Choose an answer
Covenant compounds are generally soluble is polar solvents.
Covalent compounds have low melting and boiling points
Lower than that of separate H atoms
Sometimes lower and sometimes higher than that of separate H
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Question # 3
Which of the following is not a component of hollow cathode lamp.
Choose an answer
Anode
Cathode
Filter gas
Atomic vapour
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Question # 4
Which of the following techniques is used to separate a mixture of cations.
Choose an answer
GC
FPLC
Ion exchange chromatography
Size exchange chromatography
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Question # 5
Any substance which has solidified from the liquid state with crystallization is known as
Choose an answer
Steel
Fibre
Glass
Asbestos
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Question # 6
Hybridization involves.
Choose an answer
Orbitals of same atom with slightly different energies.
Orbitals of different atoms, but with equal energies.
Orbitals of the same atom but with widely different energies.
Orbitals of different atoms with different energies.
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Question # 7
The Langmuir theory of unimolecular adsorption is generally valid at.
Choose an answer
Low pressures and low temperature
Low pressures and high temperature
High pressures and low temperature
High pressure and high temperature
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Question # 8
A combination of atomic orbitals produces a large number of closely special energy states brown as.
Choose an answer
Packet of energy
Band of energy
Botha a and b
None of the above
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Question # 9
Four elements A, B,C,D have atomic numbers Z , 1 ,Z, Z +1 and Z +2 Respectively If Z is 9, then bond between which pair of elements will be ionic.
Choose an answer
A and C
D and C
D and B
B and C
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Question # 10
All cycle engines working reversibly between same temperature of source and sink have the same efficiency This is the statement for the.
Choose an answer
Carnot cycle
Carnot theorem
Narnst theorem
Second law of thermodynamics
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Question # 11
Pig iron is also called.
Choose an answer
Cast iron
Steel
Wrought iron
Stainless steel
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Question # 12
According to the Grothus -Draper law
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Only absorbed light is effective in producing photo chemical changes
Only light between certain wavelengths
Light is effective only for photo chemical reactions is solution
The light absorbed in proportional to its intensity
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Question # 13
Which is true for DDT it is.
Choose an answer
Not a pollutant
An antibiotic
A non degradable pollutant
A pesticide
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Question # 14
Which of the following species is determined by complex metric titrations.
Choose an answer
K+
Na+
Ca+
Cl-
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Question # 15
Which of the following statement is not related with the effect of thermal pollution.
Choose an answer
Decrease in BOD
Increase in BOD
Reduction in DO
Change in algal production
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Question # 16
Thermocouples have been constructed from
Choose an answer
Chromel ve elumel
Copper vs platinum
Both
None
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Question # 17
Oxides ores of Aluminium
Choose an answer
Corundum
Bauxite
Diaspore
All above
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Question # 18
1-Butyne on oxymereuration -demercuration would give.
Choose an answer
Butanone
Butanal
Propanol and methanol
Propanoic acid and formic acid
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Question # 19
The emission of light in a biological reaction is known as
Choose an answer
Fluorescence
Phosphorescence
Bioluminescence
Photolysia
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Question # 20
Which of the following source of energy is abundant everlasting and non polluting.
Choose an answer
Nuclear
Electric
Solar
All above
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Question # 21
Which of the following technique is based on the absorption of light radiation.
Choose an answer
Spectrophotomerty
Colorimetry
NMR
All the above technique
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Question # 22
Which of the following has maximum number of unpaired electrons.
Choose an answer
Fe3+
Fe2+
Co2+
CO3+
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Question # 23
Cement is a mixture of
Choose an answer
Clay and clinker
Clay limestone and gypsum
Limestone and gypsum
Binder
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Question # 24
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 # 25
Which of the following process is not involved in the purification of bauxite.
Choose an answer
Bayer's process
Serpek's process
Hall's process
Goldsmith's process
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Question # 26
Hydrolytic reaction of fat with caustic soda is known as ______
Choose an answer
Esterification
Saponification
Acetylation
Carboxylation
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Question # 27
Toluene is o/p -orienting with respect to an electrophilic substitution reaction due to.
Choose an answer
+1 effect of the methyl group.
+1 as wellas +H effect of the methyl group
Hyper conjugatin between the methyl group and phenyl ring.
+ R effect of the methyl group
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Question # 28
Which of the following interaction is the strong.
Choose an answer
Dipole -dipole
Ion induced dipole
Ion -dipole
Dipole induced diple
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Question # 29
The study of coiled long peptide chains of protein to give a 3 dimensional structure is the study of.
Choose an answer
Primary structure
Secondary structure.
Tertiary structure
Quaternary structure.
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Question # 30
Any property whose magnitude is independent of the amount of substance present is called a/an
Choose an answer
Extensive property
Colligative property
Structural propety
Intensive property
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Question # 31
The point group of XeOF4 is.
Choose an answer
C6v
C4h
D4h
D2h
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