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NAT II Physical Science Chemistry MCQs With Answers
Question # 1
Which has largest first ionization energy?
Choose an answer
Li
Na
K
Rb
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Question # 2
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 # 3
Which of the following is monoatomic?
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Oxygen
Neon
Fluorine
Nitrogen.
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Question # 4
Which of the following units represents largest amount of energy?
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Calorie
Joule
Erg
Electron vol.
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Question # 5
Aldehydes are produce in atmosphere by
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Oxidation of secondary alcohols
Reduction of alkenes
Reaction of oxygen atoms with hydrocarbons
Reaction of oxygen atoms with ozone.
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Question # 6
All the naturally occurring processes proceed spontaneously in a direction which lead to
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Decrease of entropy
Increase of enthalpy
Increase of free energy
Decrease of free energy
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Question # 7
When a carbon atom forms single bonds with other carbon atoms, these hybird orbitals overlap with the orbitals of hydrogen to form four bonds which are
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Three sigma and one P
i
Two sigma andtwo P
i
One sigma and three P
i
Sigma
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Question # 8
Hypo is used to photography for
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Developing picture
Picture printed
The colour of picture
The fixation of picture
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Question # 9
Which of the following fluorides does not exist?
Choose an answer
NF
5
PF
5
AsF
5
SbF
5
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Question # 10
Covalent compounds are soluble in
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Polar solvents
Non-polar solvents
Concentrated acids
All solvents
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Question # 11
The main structure features of proteins is
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An ester linkage
An ether linkage
The peptide linkage
All
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Question # 12
Addition of iron fillings to CuSO
4
solution caused precipitation of Cu owing to the
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Reduction of Cu
2+
Oxidation of Cu
2+
Reduction of Fe
Reduction of Fe
3+
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Question # 13
Which one is primary alcohol?
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Buten-2-ol
Propan-2-ol
Butaon-1-ol
2, 3-Dimethylhexane-4-ol
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Question # 14
The disaccharide present in milk is
Choose an answer
Sucrose
Maltose
Lactose
Cellobiose
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Question # 15
When excess of SnCl
2
is added to a solution of HgCl
2, a white precipitate turning to grey is obtained. They grey colour is due to the formation of
Choose an answer
Hg
2
Cl
2
SnCl
4
Sn
Hg
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Question # 16
Which one of the following elements occurs free in nature?
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N
P
As
Sb
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