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NAT II Physical Science Chemistry MCQs With Answers
Question # 1
Which metal is protected by a layer of its own oxide?
Choose an answer
Al
Ag
Au
Fe
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Question # 2
In the manufacture of iron from haematite, limestone is added to act as.
Choose an answer
Flux
A reducing agent
Slag
An oxidizing agent
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Question # 3
Ionic solids with defects, contain
Choose an answer
Equal number of cation and anion vacancies
Interstitial anions and anion vacancies
Cation vacancies only
Cation vacancies and interstitial cations
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Question # 4
Which inorganic precipitate acts as semipermeabale membrane?
Choose an answer
Calcium sulphate
Barium oxalate
Nickel phosphate
Copper ferrocyanide
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Question # 5
Which of the following represents elements in order of increasing atomic size?
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I, Br, Cl
Na, Mg, C
C, N, O
Li, Na, K
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Question # 6
Natural fertilizer provides phosphorus to plants in the form of P
2
O
5
Choose an answer
1.2 kg
2.2 kg
3.2 kg
4 kg
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Question # 7
Ethyl chloride on treatment with aqueous alkali gives
Choose an answer
Ethane
Ethene
Ethanal
Ethanol
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Question # 8
Given below are some statements concerning formic acid, which of them is true?
Choose an answer
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 # 9
Acetic anhydride is obtained from acetyl chloride by the reaction of
Choose an answer
P
2
O
5
H
2
SO
4
CH
3
COONa
CH
3
COCH
3
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Question # 10
Which of the following oxides is peroxide?
Choose an answer
Na
2
O
2
MnO
2
BaO
SO
2
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Question # 11
Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH
4
or LiAIH
4
?
Choose an answer
1-Propanol
2-Propanol
2-Methyl-2-propanol
Ethanol
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Question # 12
The rotation of two carbon atoms joined by double bond would happened only if
Choose an answer
P
i
bond is broken
Sigma bond is broken
Both bonds are broken
None of above
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Question # 13
Which of the following statements is most appropriate about effective nuclear charge? It depends upon
Choose an answer
The shielding constant
The atomic number
The charge on the nucleus
Both the nuclear charge and the shielding
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Question # 14
Bragg's law is given by equation
Choose an answer
n
λ
= 2
θ
sin
θ
n
λ
= 2 d sin
θ
2 n
λ
= d sin
θ
n
λ
= 1/2 d sin
θ
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Question # 15
The most reactive compound for electrophilic nitration will be
Choose an answer
Benzyl chloride
Benzoic acid
Nitrobenzene
Chlorobenzene
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Question # 16
Acid rains are produced by
Choose an answer
Excess NO
2
and SO
2
from burning fossil fuels
Excess production of NH
3
by industry and coal gas
Excess release of carbon monoxide by incomplete combustion
Excess formation of CO
2
by combustion and animal respiration
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