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10th Class Chemistry Chapter 16 Chemical Industries English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
In the bessemerization process.
Choose an answer
Roasted ore is beated.
Molten matte is removed.
Molten matte is heated
Molten matte is added
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Question # 2
Extraction of metals from its ores is called.
Choose an answer
Metallurgy
Mining
Griding
All
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Question # 3
A saturated solution of sodium chloride is called.
Choose an answer
Brine
Suspension
Colloidal
None of these
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Question # 4
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 # 5
Blast furnace usually used for the metallurgy of.
Choose an answer
Iron
Copper
Aluminum
Both a and b
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Question # 6
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 # 7
Sindh alkalies limited was established near Karachi in.
Choose an answer
1965
1966
1970
2000
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Question # 8
When NaHCO
3
is heated if forms:
Choose an answer
CO
2
Ca(OH)
2
CaCO
3
CaO
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Question # 9
How many percentage blister copper is pure?
Choose an answer
95%
75%
98%
100%
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Question # 10
Chemical formula of copper glance is:
Choose an answer
Cu2O
Cu2S
CuFeS2
CuSO4
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Question # 11
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 # 12
In forth flotation process the ore particles are preferentially wetted by:
Choose an answer
water
oil
benzene
petrole
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Question # 13
Which contains sufficient amount of metal?
Choose an answer
Mineral
Ores
Rocks
Soil
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