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Chemistry

Chemistry
Molality of pure water is

18
55.5
5.55
1.8

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Chemistry
The inexpensive and commonly used variety of glass is called soda glass.

is made using soda lime
was initially used for storing sodium carbonate
is made using soda(sodium carbonate)
was used initially for making bottles of soda(carbonated drink)

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Chemistry
An example of major air pollutant is

Carbon monoxide
Carbon dioxide
Helium
Oxygen

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Chemistry
Magnetite is

Fe2O3
Fe3O4
2Fe2O3. 3H2O
FeCO3

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Chemistry
Name two elements that find wide application in transistor industry

Iridium and Germanium
Tungsten and Platinum
Carbon and Platinum
Silicon and Germanium

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Chemistry
The acid rain destroys vegetations because it contains

Nitric acid
Ozone
Sulphuric acid
Carbon monoxide

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