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Online Tests
Chemistry 10th Class English Medium Unit 16 Online Test MCQs With Answers
Question # 1
How many units are in Pakistan for manufacturing of Urea.
Choose an answer
3
6
9
12
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Question # 2
Petroleum fraction having composition C
7
to C
10
IS called
Choose an answer
Petroleum gas
Petroleum Ether
Kerosine oil
Gasoline or petrol
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Question # 3
Composition of carbon in the diesel oil.
Choose an answer
C
7
-C
10
C
10
-C
12
C
13
-C
15
C
15
-C
18
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Question # 4
In solvay's process slaked lime is used to:
Choose an answer
Prepare CO
2
Prepare quick lime
Recover ammonia
Form Na
2
CO
3
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Question # 5
The number of carbon atoms present in petroleum ether.
Choose an answer
1-5
2-5
3-7
5-7
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Question # 6
How many % age of urea is used as fertilizers?
Choose an answer
80%
90%
95%
98%
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Question # 7
Concentration of the copper ore is carried out by:
Choose an answer
Calcinations
Roasting
Forth flotation
Distillation
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Question # 8
How many % age of nitrogen in urea fertilizers?
Choose an answer
40.6
45.6
46.6
50
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Question # 9
Petroleum fraction having composition C
5
to C
7
is.
Choose an answer
Petroleum Gas
Petroleum Ether
Kerosine oil
Gasoline or petrol
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Question # 10
On which bases froth floatation process take place?
Choose an answer
Density bases
Concentration basis
Watting basis
None of these
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Question # 11
the chemical formula of chalcopyrite is:
Choose an answer
Cu
2
S
CuFe
2
S
CuS
FeS
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Question # 12
How many % age of nitrogen present in air by volume?
Choose an answer
70%
75%
78%
80%
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Question # 13
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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