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NAT II Biological Science Chemistry MCQs With Answers
Question # 1
Which of the following pairs are chemically dissimilar?
Choose an answer
Na and K
Ba and Sr
Zr and Hf
Ca and Zn
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Question # 2
Hybridization explain the ----------- of orbitals
Choose an answer
Type of Bonding
Shapes
Shape and Type of bonding
None of above
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Question # 3
The structure of XeF6
Choose an answer
Distorted octahedral
Pyramidal
Tetrahedral
None of the above
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Question # 4
By using the fluted filter paper rate of filtration is
Choose an answer
Increased
Decreased
Filtration is constant
Having no effect
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Question # 5
Addition of iron fillings to CuSO
4
solution caused precipitation of Cu owing to the
Choose an answer
Reduction of Cu
2+
Oxidation of Cu
2+
Reduction of Fe
Reduction of Fe
3+
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Question # 6
The main structure features of proteins is
Choose an answer
An ester linkage
An ether linkage
The peptide linkage
All
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Question # 7
All the naturally occurring processes proceed spontaneously in a direction which lead to
Choose an answer
Decrease of entropy
Increase of enthalpy
Increase of free energy
Decrease of free energy
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Question # 8
Wholer prepared urea from
Choose an answer
Ammonia
NH
4
CNO
NH
3
Uric acid
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Question # 9
The rate at which a substance reacts depends on its
Choose an answer
Atomic weight
Equivalent weight
Molecular weight
Active mass
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Question # 10
Potassium is kept in
Choose an answer
Water
Ammonia
Alcohol
Kerosene.
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Question # 11
Most common reactions of benzene and its derivatives are
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Electrophilic addition reactions
Electrophilic subsitution reactions
Nucleoophilic addition reactions
Nucleophilic substitution reactions
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Question # 12
The weight of 11.2 litres of CO
2
at S.T.P. would be
Choose an answer
88 g
44 g
32 g
22 g
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Question # 13
Which of the following has linear shape?
Choose an answer
SP
SP
2
SP
3
None of the above
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Question # 14
Carbon atom holding halogen in aryl halides is
Choose an answer
sp
2
-hybridesed
sp
3
-hybridesed
sp-hybridesed
sp
3
d-hybridesed
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Question # 15
Ascorbic acid is chemical name of
Choose an answer
Vitamin D
Vitamin A
Vitamin C
Vitamin B6
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Question # 16
Which of the following has no tin in its composition?
Choose an answer
Solder
Bronze
Brass
Tin stone
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Question # 17
Reaction of ethylamine with chloroform in alcoholic KOH produces
Choose an answer
CH
3
OH
CH
3
NC
C
2
H
5
NC
C
2
H
5
CN
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Question # 18
Which of the following method is most appropriate for the manufacture of methane?
Choose an answer
By reduction of CH2SL2
Wurtz reaction
Liquification of natural gas
None of these
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Question # 19
The treatment of benzene with isobutene in the presence of sulphuric acid give
Choose an answer
isobutyl benzene
tert-Butyl benzene
n- Butyl benzene
no reaction
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Question # 20
The percentage of oxygen in NaOH is
Choose an answer
40
60
8
10
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Question # 21
Which of the following is not present in RNA?
Choose an answer
Uracil
Thymine
Ribose
Phosphate
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