When a gas is compressed it changes its state into a
plasma
vapour
liquid
solid
Which among the following can exist in vapour state
oxygen
hydrogen
carbon dioxide
water
When the temperature of a liquid is increased a little, what happens to its particles?
They stop vibrating.
They move so far apart that the liquid becomes a gas.
They start vibrating more.
They come closer together.
The ice floats on water because
its density is more than water
its density is less than water
it has intermolecular space
none of the above
Equal volumes of all gases under similar conditions of temperature and pressure contain equal numbers of molecules. This statement was made by
John Dalton
Berzilius
Avogardo
Gay-Lussac
Cooking of rice at higher altitudes is difficult because
water boils at 100°C
water boils at
boiling point of water is constant
Which one of the following is not a property of a gas?
Definite volume
Can be compressed
Definite mass
No definite shape
When two gases mix together, they are said to
evaporate
condense
diffuse
melt
