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NAT II Physical Science Chemistry MCQs With Answers
Question # 1
Which of the following possesses the highest melting point?
Choose an answer
Chlorobenzene
o- Dichlorobenzene
m-Dichlorobenzene
p-Dichlorobenzene
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Question # 2
Chile salt petre is
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NaNO
3
Na
2
SO4
KNO
3
Na
2
S
2
O
3
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Question # 3
Reaction of acids with alcohols is also known as
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Esterification
Saponification
Alkalization
None
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Question # 4
Which of the following elements is most electronegative?
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Oxygen
Chlorine
Nitrogen
Fuorine
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Question # 5
Wholer prepared urea from
Choose an answer
Ammonia
NH
4
CNO
NH
3
Uric acid
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Question # 6
Given below are some statements concerning formic acid, which of them is true?
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It is a weaker acid than acetic
it is a reducing agent
When its calcium salt is heated, it forms a ketone
It is an oxidizing agent
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Question # 7
Chief air pollutant which is likely to deplete ozone layer
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Suphure dioxide
Carbon dioxide
Carbon dioxide
Nitrogen oxides and chloro flrorocarbons
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Question # 8
The unit rate of a reaction can be increased in general by all the factors except by
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Using a catalyst
Increasing temperature
Increasing the activation energy
Increasing the conc. of reactants
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Question # 9
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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Question # 10
Water (H
2O
) is liquid while hydrogen sulphide (H
2
S) is a gas because
Choose an answer
Water has higher molecular weight
Hydrogen sulphide is a weak acid
Sulphure has high electronegativity than oxygen
Water molecules associate through hydrogen
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Question # 11
Bond angle is minimum for
Choose an answer
H
2
O
H
2
S
H
2
Se
H
2
Te
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Question # 12
The number of oxygen atoms in 4.4 g of CO
2
is approximately
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1.2 x 10
23
6 x 10
22
6 x 10
23
12 x 10
23
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Question # 13
Which has maximum protein content?
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Ground nut
Cow milk
Egg
Wheat
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Question # 14
A cell constant is generally found by measuring the conductivity of aqueous solution of
Choose an answer
BaCl
2
KCl
NaCl
MgCl
2
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Question # 15
The maximum number of electrons in a subshell for which
ι = 3 is
Choose an answer
14
10
8
4
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Question # 16
As a fixing agent in photography, sodium thisoulphate is used for
Choose an answer
Dissolving out unreacted silver bromide
Converting silver halides to metallic silver
Reducing solubility of AgBr
Preventing overdeveloping and fogging.
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