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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
The equivalent conductance (^) and molar conductance ( ^ m ) of BaSO4 are related as.
Choose an answer
^ = ^m/2
^/2 = ^m
^ = ^m
^ = ^m/4
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Question # 2
Consider to violet colored compund.[Cr(OH)2)6 Cl3 and the yellow compound. [Cr(NH3)6]C;2 which of the following statements is false.
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Both chromium metal ions are paramagnetic with 3 unpaired electrons.
[Cr(NH3)6)3+ is calculated directly form the energy of yellow light
For [Cr(OH)2)6]3+ is less than for [Cr(NH3)6]3+
The two complexes absorb their complementary colors.
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Question # 3
What types of bonding occurs in d-block elements.
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Ionic
Covalent
Metallic
Both B and C
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Question # 4
The formula of hexa borane is.
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B4H10
B6 H10
B5 H9
B8 H12
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Question # 5
Rutherford proposed the nuclear model of the atom to account for the result of experiments in which the alpha particles are scattered from metal foils.Which of the following statements in not related to Rutherford observation.
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An atom consists of central core or nucleus around which the protons exist.
The nucleus has most of the mass of the atom
the nucleus consists of protons and neutrons.
Each distinct atom has a specific number of protons.
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Question # 6
Which of the following statement is not correct with respect to electrometric effect.
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It is permanent effect
It is brought into play instantaneously at the demand of attacking reagent
It proceeds a polar addition reaction
The original electronic condition is restored after the removal of tacking regent.
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Question # 7
The height to which a liquid will rise in an open capillary tube is inversely proportional to.
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Temperature of the liquid
Surface tension
Density of the liquid
Air pressure
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Question # 8
The Langmuir theory of unimolecular adsorption is generally valid at.
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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 # 9
One arm of each t-RNA terminates in the base sequence.
Choose an answer
UGU
GGC
ACT
CCA
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Question # 10
Which of the following species is very poor oxidizing agent
Choose an answer
H+
Zn
2+
Fe
3+
MnO
4
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Question # 11
The point group of XeOF4 is.
Choose an answer
C6v
C4h
D4h
D2h
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Question # 12
a-pinene hydrochloride on warming rearrangements to form bornyl chloride
Choose an answer
Pinacol pinacolone
hofmann
Wagner Meerwein
Wolf
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Question # 13
Each of the following compound react with Grignard's reagent to form alkane exxcept.
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Ethanal
Ethanoic acid
Ethanol
Ethync
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Question # 14
Carbon in wrought iron is present as
Choose an answer
Silicon carbide
Iron carbide or comentite
Graphite
Partly as iron carbide and partly as graphite
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Question # 15
Relative order of acidity of oxy acid
Choose an answer
HCIO > HCIO2 > HCIO3 > HCIO4
HCIO4 > HCIO3 >HCIO2 > HCIO
HCIO3 > HCIO2 > HCIO > HCIO4
HCIO2 > HCIO4 > HCIO3 > HCIO
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Question # 16
Group IV A consist elements.
Choose an answer
3
4
5
6
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Question # 17
The silicate chains are present in
Choose an answer
Silica
asbestos
Beryl
Clays
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Question # 18
The bond formed by complete transfer of electrons from electropositive to more electronegative atom is called.
Choose an answer
Ionic bond
Covalent bond
Mettalic bond
Co ordinates bond
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Question # 19
The process of extracting a metal in pure form its ores is known as.
Choose an answer
Crushing
Grinding
Dressing
Metallurgy
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Question # 20
The metallic character of group 14 elements
Choose an answer
Decreases from top to bottom
Increases from top to bottom
Does not change gradully
Has no significance
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Question # 21
Water that easily forms a lather of films and frotha when agitated with a soap solution called.
Choose an answer
Hard water
Heavy water
Soft water
Washing water
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Question # 22
Which of the following has highest ionization energy.
Choose an answer
Oxygen
Argon
Barium
Caealum
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Question # 23
During sintering densification is not due to
Choose an answer
Atomic diffusion
Surface diffusion
Bulk diffusion
Surface tenstion
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Question # 24
Which of the following statements not correct with the concept of Bronsted concept of acids and bases.
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An acid can donate a proton
A base can accept a proton
This concept has many bases that have OH- ions
This concept is more general
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Question # 25
Example of linear geometry
Choose an answer
XeF2
F2 and HgCl2
CdI2 AND Ag Cl3
All of the above
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Question # 26
The emission of light characteristics of metal and correlation of intensity of the light emitted with concentration of that metal forms the basis of.
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Roman spectroscopy
IR spectroscopy
Flame photometry
Rotational spectroscopy
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Question # 27
Which of the following elements is most electropositive.
Choose an answer
C
N
O
Be
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Question # 28
Red colour of glass of due to the presence of
Choose an answer
Cu2O
CoO
MnO2
CdS
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Question # 29
Concentrated aqueous sodium hydroxide can separate a mixture of.
Choose an answer
Al3+ and Sn2+
Al3+ and Fe3+
Al3+ and Zn2+
Zn2+ and Pb2+
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Question # 30
Which of the following process is not physical in nature.
Choose an answer
Mixing
Flocculation
Sedimentation
Activated sludge process
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Question # 31
The percentage of nitrogen in ammonia is _______________%
Choose an answer
32
82
25
55
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