A process in which one substance spreads out through another is
Adsorption
Sublimation
Diffusion
Absorption
With references to the pressure of the atmosphere at sea level ________ of any substance is measured.
Melting point
Freezing point
Boiling point
Density
The pressure of the atmosphere is less.
On the surface of the earth
At the sea level
At lower altitudes
At higher altitudes
Impure water forms ice that melts at a temperature below ________ and boils at a temperature above
1o C & 98oC
10o C & 110oC
0o C and 100oC
5oC & 105oC
The forces of attraction between the particles is least in.
Solid
Gas
Liquid
None of these
Sublimation occurs when
A gas turns into a solid
When a solid turns into a gas
A liquid into a gas
Both (i) & (iii)
