Chemistry MCQS for Class 10
When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of:
Cu2S + Cu2O
Cu2S + FeS
FeO + SO2 + Cu2S
Cu2O +FeS
In the bessemerization process.
Molten matte is heated
Molten matte is removed.
Roasted ore is beated.
Molten matte is added
Which contains sufficient amount of metal?
Soil
Mineral
Ores
Rocks
Metallurgy involves which of the following steps?
Mining and enrichment
Refining and casting.
All of these
Reduction
Blonde hair contains compounds of:
molybdenum
iron
titanium
copper
Composition of carbon in kerosene oil is.
C16-C18
C12-C12
C10-C12
C30-C30
At the time of partition, How many industries wee present in Pakistan.
40
30
32
34
Chemical formula of copper glance is:
CuFeS2
Cu2S
CuSO4
Cu2O
Chemical formula of matte will:
Cu2S
Cu2O
Cu2S.FeS
FeS
The elements that do not conduct heat and electricity are called.
Alloy
Metallurgy
Non metal
Metalloid
Which one of the ore of copper?
Copper glance
Both a and b
None of these
Chalcopyrite
On which bases froth floatation process take place?
Concentration basis
Watting basis
Density bases
None of these
Compound of metal exist under earth crust are called.
Ore
Minral
None of these
Gangue
Blast furnace usually used for the metallurgy of.
Aluminum
Both a and b
Iron
Copper
the chemical formula of chalcopyrite is:
FeS
CuS
CuFe2S
Cu2S
Formula of baking soda is.
Na2SO4
NaHCO3
Na2PO4
Na2CO3
Raw materials used in Solvay’s process.
Brine
Ammonia gas
All
Lime stone
The number of carbon atoms present in petroleum gas.
2-Jan
5-Jan
3-Jan
4-Jan
Bister copper is pure about;
98%
70%
90%
80%
Extraction of metals from its ores is called.
Metallurgy
All
Griding
Mining
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