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Online Tests
Chemistry 10th Class English Medium Unit 16 Online Test MCQs With Answers
Question # 1
Urea is nitrogenous fertilizer. It consist of nitrogen.
Choose an answer
26.6 %
36.6%
46.6%
56.6%
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Question # 2
the chemical formula of chalcopyrite is:
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Cu
2
S
CuFe
2
S
CuS
FeS
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Question # 3
When NaHCO
3
is heated if forms:
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CO
2
Ca(OH)
2
CaCO
3
CaO
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Question # 4
Blast furnace usually used for the metallurgy of.
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Iron
Copper
Aluminum
Both a and b
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Question # 5
Composition of carbon in the diesel oil.
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C
7
-C
10
C
10
-C
12
C
13
-C
15
C
15
-C
18
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Question # 6
Formula of Urea is.
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KCNO
H
2
N-CO-NH
2
HN-CO
2
-NH
H
3
N-CO-NH
3
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Question # 7
The number of carbon atoms present in petroleum ether.
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1-5
2-5
3-7
5-7
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Question # 8
A saturated solution of sodium chloride is called.
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Brine
Suspension
Colloidal
None of these
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Question # 9
Froth flotation process is used to concentrate the ore on:
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Density basis
Concentration basis
Wetting basis
Magnetic basis
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Question # 10
In forth flotation process the ore particles are preferentially wetted by:
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water
oil
benzene
petrole
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Question # 11
How many % age of nitrogen in urea fertilizers?
Choose an answer
40.6
45.6
46.6
50
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Question # 12
When CO
2
is passed through the ammonical brine the only salt that precipitates is:
Choose an answer
NaHCO
3
NH
4
HCO
3
Na
2
CO
3
(NH
4
)
2
CO
3
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Question # 13
Imperial chemical industries was established in.
Choose an answer
1942
1944
1950
1990
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