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PPSC Chemistry Full Book Test MCQs With Answers
Question # 1
Ingold's isoprene rule states that in tepenoids isoprene units are joined.
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Head to tail
Head to Head
Tail to Tail
In a random order
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Question # 2
Which of the following statements is worng.
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Covalent compounds are generally soluble is polar solvents
Covalent compounds have low melting and boiling point.
Ionic solids do not conduct electricity is solid state
Ionic compounds conduct electricity in the fused state.
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Question # 3
Pick out the incorrect statement for XeF4
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XeF4 disproportionate violently with water
It is used as fluorinating agent
It has octahedral structure for geometry
It oxidizes I to I
2
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Question # 4
The pH of 0.001 N HCl is
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1
2
3
4
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Question # 5
The strongest acid is.
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HNO2
HNO3
H2N2O2
HNOS
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Question # 6
The most reactive alkali metal among the following is
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Li
Na
Cs
Rb
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Question # 7
Which of the following cast iron is heat treated for ductility.
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Gray iron
Malleable iron
White iron
None of these
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Question # 8
A colloidal system in which a liquid is dispersed in a solid is called a/an
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Emulsion
Sol
Gel
Precipitate
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Question # 9
Which is true for DDT it is.
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Not a pollutant
An antibiotic
A non degradable pollutant
A pesticide
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Question # 10
A red color gas, on condensing ti gives a dark blue liquid.
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NO
N2O
N2O3
N2O4
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Question # 11
Sodium reacts with excess of oxygen to form
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Na2O
NaO2
Na2O2
NaO
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Question # 12
In each period the element with lest electron affinity belongs to.
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Group 1
Group 14
Group 17
Group 18
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Question # 13
What ASTM test for shear strength is designated for plastics.
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D 732
D 790
D 695
D 638
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Question # 14
The wire of flash bulb is made up of.
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Cu
Ag
Mg
Ba
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Question # 15
Which is incorrect statement for Xe F2.
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It has linear structure.
It is hydrolyzed rapidly in aqueous solution of a base
It oxidizes Cl and I to Cl2 and I 2 respectively
It cannot act as F donor
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Question # 16
Glucose and fructose react with which of the following reagent to give same product.
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Tollen's reagent
Phenyl hydrazine
Hydroxyl amine
All of these
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Question # 17
The maximum absorption in [Ti(OH)2)6 3+ take place at wavelength of.
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4000 A
o
5000 A
o
6000 A
o
10000 A
o
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Question # 18
On hybridization of one s and one p orbitals we get.
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Two mutualy perpendicular orbitals
Two orbitals at 180
o
Four orbitals directed tetrahedrally
Three orbitals in a plane
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Question # 19
An example of acyclic polytropenoid is
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Myrcone
Buna -S
Synthetic rubber
Natural rubber
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Question # 20
Used in TV sets and sound movies to give ready response to electrical potential
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He
Ne
Ar
Kr
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Question # 21
To complete transfer of a shared pir of electrons to one of the atoms joined by a double or triple bond at the requirement of an attacking reagent is known as.
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Inductive effect
Resonance effect
Eletromeric effect
Stark effect
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Question # 22
The volume of a given mass of gas at constant temperature varies inversely with the pressure. This is a statement of.
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Charlea's law
Avogadro's law
Boyle's law
Dalton 's law
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Question # 23
The IUPAC suffix used for ______ NC group is
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Cyanide
Isocyanides
Carbylamines
Nitrite
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Question # 24
Select the major product obtained from the addition of HBr to I -Methyl cyclohexene
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1-bromo -2- methyl cyclohexane
6- bromo-i- methyl cyclohex -i- ene
3- bromo -1- methyl cyclohex - 1- ene
I-bromo -I- methyl cyclohexane
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Question # 25
The smog is essentially caused by the presence of.
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O3 and N2
O2 and N2
Oxides of sulphur and nitrogen
O2 and O3
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Question # 26
Noble gases are sparingly soluble in water owing to.
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Dipole -dipole interactions
Dipole -induced dipole interactions
Hydrogen bonding
Induced dipole -instantaneous dipole interactions
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Question # 27
In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is.
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8
16
12
20
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Question # 28
The rising world temperature will have serious effect on.
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Agriculture
Animal production
Human being
All above
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Question # 29
Water pollution is due to
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Agricultural discharges
Swages and other wastes
Industrial effects
All the above
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Question # 30
Which of the following represents the correct order of ionic radii
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La+ < Na+ < K+ < Rb+
Li+ > Na + > K+ >Rb+
Li = Na + = K+ = Rb+
Rb +> Na+> K+ > Li+
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Question # 31
In extraction of iron, the furnace charge consists of iron ore, coke and limestone. The function of limestone is to act as.
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An oxidation agent
A reducing agent
Flux
Slag
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