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Chemical formula for water is

NA
C6H12O6
H2SO4
H2O


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In which variety of coal, the deposit contains recognisable traces of the original plant material

Bitumen
Sub bitumen
Lignite
Peat


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The average salinity of sea water is

0.035
0.045
0.025
0.015


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________ usually coats non stick utensils

White paint
Thorium
Teflon
Titanium


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Carbon, diamond and graphite grouped together are called

Ore
Isomorph
Allotropes
Isotopes


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How can we remove permanent hardness of water

By addition of sodium carbonate
By addition of Sugar
By addition of sulphur
By addition of lime


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Where do we keep Sodium metal ?

Under water
With sulphur
Under kerosene
Under petrol


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Gun metal contains

Copper and Zinc
Copper and Iron
Copper and Brass
Copper and Tin


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Laughing gas is also known as

Chlorine dioxide
Nitrous Oxide
Bromine dioxide
Sulfur dioxide


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Which metal remain in liquid form under normal conditions

Mercury
Sulphur
Zinc
Carbon


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