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NAT II Physical Science Chemistry MCQs With Answers
Question # 1
The reaction/method that does not give an alkane is
Choose an answer
Catalytic hydrogenation of alkanes
Wurtz reaction
Hydrolysis of alkyl magnesium bromide
Dehydrohalogenation of an alkyl halide.
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Question # 2
Which of the following value of
Δ
Hf represent that product is least stable?
Choose an answer
-94.0 kcal mol
-1
-231.6 kcal mol
-1
+21.4 kcal mol
-1
+64.8 kcal mol
-1
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Question # 3
Which one of the following compounds does not exist?
Choose an answer
NCl
5
AsF
5
SbCl
5
PF
5
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Question # 4
In crystal structure of sodium chloride, the arrangement of CI
-
ions is
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Fcc
Both Fcc and bcc
Bcc
None of these
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Question # 5
Which of the following is acidic?
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SO
3
N
2
O
BeO
HgO
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Question # 6
The wire in the flash bulbs is made up of
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Mg
Ba
Cu
Ag
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Question # 7
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 # 8
Which of the following reaction is used for detecting presence of carbonyl group?
Choose an answer
Reaction with hydroxylamine
Reaction with hydrazine
Reaction with phenyl hydrazine
All
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Question # 9
Which of the following fluorides of xenon is impossible?
Choose an answer
XeF
2
XeF
3
XeF
4
XeF
6
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Question # 10
Salol is prepared from
Choose an answer
Salicyclic acid and phenol
Salicyclic acid and methyl alcohol.
Both
None
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Question # 11
The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepare by a chemical reaction form a compound of nitrogen due to the presence of the following in aerial nitrogen.
Choose an answer
Argon
CO
2
Some nitrogen molecules analogous to O2
Greater amount of nitrogen molecules derived from N
15
isotope.
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Question # 12
Number of elements present in the fifth period of periodic table is
Choose an answer
8
10
18
32
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Question # 13
Which inorganic precipitate acts as semipermeabale membrane?
Choose an answer
Calcium sulphate
Barium oxalate
Nickel phosphate
Copper ferrocyanide
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Question # 14
The number of oxygen atoms in 4.4 g of CO
2
is approximately
Choose an answer
1.2 x 10
23
6 x 10
22
6 x 10
23
12 x 10
23
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Question # 15
One mole of gas refers to
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The number of molecules in one litre of gas
The number of molecules in one gram of gas
The number of molecules contained in 12 grams of
12
C isotope
The number of molecules in 22.4 litres of a gas at S.T.P.
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Question # 16
Ammonia gas used directly as a fertilizer is injected into the soil at a depth of about
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Two inches
Three inches
Five inches
Six inches
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