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NAT II Physical Science Chemistry MCQs With Answers
Question # 1
Inter molecular forces in solid hydrogen are
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Covalent forces
Van der Waal forces or London dispersion forces
Hydrogen bonds
All of these.
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Question # 2
By using the fluted filter paper rate of filtration is
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Increased
Decreased
Filtration is constant
Having no effect
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Question # 3
Setting of Plaster of Paris involves
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Oxidation with atmospheric
Combination with atmospheric CO
2
Dehydration
Hydration to yield another hydrate
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Question # 4
Al is more reactive than Fe but Al is less easily corroded than Fe because
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It is a noble metal
oxygen forms a protective reaction easily with water
Iron undergoes reaction easily with water
Fe form mono and divalent ions.
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Question # 5
Calcium acetate when dry distilled gives
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Formaldehyde
Acetaldehyde
Acetone
Acetic anhydride
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Question # 6
Bond angle is minimum for
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H
2
O
H
2
S
H
2
Se
H
2
Te
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Question # 7
SO
2
and NO
2
produce pollution by increasing
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Alkalinity
Acidity
Neutrality
Buffer action
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Question # 8
Which of the following is monoatomic?
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Oxygen
Neon
Fluorine
Nitrogen.
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Question # 9
Sulphure dioxide affects
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Cell wall
Plasmodesmata
All membrane systems
Nucleus
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Question # 10
Octane number is zero for
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n-Heptane
Isooctane
n-Hexane
Isoheptane
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Question # 11
Which is the most amphoteric?
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Na
2
O
MgO
Al
2
O
3
CaO
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Question # 12
Outermost shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be
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XY
X
2
Y
X
2
Y
3
XY
2
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Question # 13
Which one of the following elements occurs free in nature?
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N
P
As
Sb
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Question # 14
The relative rates of diffusion of a gas (molecular weight = 128) as compared to oxygen is
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2 times
1/4
1/8
1/2
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Question # 15
Hybridization explain the ----------- of orbitals
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Type of Bonding
Shapes
Shape and Type of bonding
None of above
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