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Online Tests
Chemistry 10th Class English Medium Unit 16 Online Test MCQs With Answers
Question # 1
The process of removal of gangue form the ore is technically known as:
Choose an answer
concentration
purification process
metallurgy
refining
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Question # 2
the chemical formula of chalcopyrite is:
Choose an answer
Cu
2
S
CuFe
2
S
CuS
FeS
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Question # 3
Sodium carbonate is manufactured by.
Choose an answer
Haber's process
Ostwald's process
Solvay's process
All
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Question # 4
Which contains sufficient amount of metal?
Choose an answer
Mineral
Ores
Rocks
Soil
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Question # 5
The number of carbon atoms present in fuel oil.
Choose an answer
14-18
15-18
16-18
17-18
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Question # 6
Which one of the following organic compound is found is gasoline?
Choose an answer
C
2
H
4
C
3
H
8
C
7
H
10
C
12
H
26
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Question # 7
Process of heating the concentrated ore to high temperature in excess of air is called.
Choose an answer
Roasting
Smelting
Bessemerization
All
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Question # 8
Which one of the following is manufactured by Solvar's process:
Choose an answer
caustic soda
washing soda
urea
sulphuric acid
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Question # 9
When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of:
Choose an answer
Cu2S + Cu2O
Cu2O +FeS
Cu2S + FeS
FeO + SO2 + Cu2S
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Question # 10
Urea is nitrogenous fertilizer. It consist of nitrogen.
Choose an answer
26.6 %
36.6%
46.6%
56.6%
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Question # 11
In smelting process a small amount of coke is required because:
Choose an answer
it is highly endothermic process
it is highly exothermic process
it is very fast process
it is very slow process
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Question # 12
When NaHCO
3
is heated it forms.
Choose an answer
CO
2
Ca(OH)
2
CaCO
3
CaO
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Question # 13
On which bases froth floatation process take place?
Choose an answer
Density bases
Concentration basis
Watting basis
None of these
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