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Chemistry

Chemistry
Which one of the following does not contain Silver ?

Ruby Silver
Horn Silver
German Silver
Lunar Caustic

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Chemistry
Match the List-I with List-II and select the correct answer using the codes given below the listsList-I (Green house gas)List-II(Major source)F.Carbondioxide1.Enteric fermentation in cattleG.Methane2.Burning of fossilH.Chloroflro carbons3.Mercury compounds in waste waterJ.Nitrous oxide4.Nylon production 5.Air conditioner and refrigeration unitsCodes :FGHJA.2154B.3421C.3241D.1234

B
D
C
A

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Chemistry
Soap helps in better cleaning of clothes because

It gives strength to solution
It absorbs the dirt
Soap acts like catalyst
It reduces the surface tension of solution

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Chemistry
Chile saltpeter is the common name of:

Sodium nitrite
Sodium nitrate
Potassium nitrate
Potassium nitrite

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Chemistry
Gobar gas mainly contains

Hydrogen sulphide
Carbon dioxide
Methane
Carbon monoxide

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Chemistry
Percentage of carbon in steel ranges from

1.5 to 3.0
3.0 to 4.0
0.1 to 1.5
4.0 to 6.0

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