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Online Tests
Chemistry 10th Class English Medium Unit 16 Online Test MCQs With Answers
Question # 1
Formula of soda ash is.
Choose an answer
Na
2
CO
3
NaHCO
3
Na
2
SO
4
Na
3
PO
4
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Question # 2
Sodium carbonate is manufactured by.
Choose an answer
Haber's process
Ostwald's process
Solvay's process
All
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Question # 3
When NaHCO
3
is heated if forms:
Choose an answer
CO
2
Ca(OH)
2
CaCO
3
CaO
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Question # 4
When crude oil is heated in the fractionating tower:
Choose an answer
Vapour of higher boiling point fraction condense first in the lower part of the tower.
Vapours of lower boiling point fraction condense first in the lower part of tower.
Vapour of higher boiling point condense lather in the upper part of tower.
Vapours of higher boiling point never condense.
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Question # 5
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 # 6
How many % age of nitrogen in urea fertilizers?
Choose an answer
40.6
45.6
46.6
50
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Question # 7
Chemical formula of copper glance is:
Choose an answer
Cu2O
Cu2S
CuFeS2
CuSO4
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Question # 8
Matte is a mixture of:
Choose an answer
FeS and CuS
Cu
2
O and FeO
Cu
2
S and FeS
CuS and FeO
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Question # 9
Which one of the following is not a fraction of petroleum?
Choose an answer
Kerosene oil
Diesel oil
Alcohol
Petrol
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Question # 10
Sindh alkalies limited was established near Karachi in.
Choose an answer
1965
1966
1970
2000
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Question # 11
Urea is nitrogenous fertilizer. It consist of nitrogen.
Choose an answer
26.6 %
36.6%
46.6%
56.6%
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Question # 12
Ammonical brine is prepared by dissolving ammonia gas in.
Choose an answer
NaCl
CaCO
3
CaCl
2
Na
2
SO
4
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Question # 13
the chemical formula of chalcopyrite is:
Choose an answer
Cu
2
S
CuFe
2
S
CuS
FeS
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