Stoichiometry
The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour

Is not dependent on the temperature
Measures the depression in freezing point
Measures the elevation in boiling point
Is a function of the liquid phase composition

ANSWER DOWNLOAD EXAMIANS APP

Stoichiometry
According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.

In the formation of solution, chemical combination/molecular association between unlike molecules takes place
The attractive forces between like and unlike molecules are almost equal
The component molecules are non polar and are of almost equal size
No component is concentrated at the surface of the solution

ANSWER DOWNLOAD EXAMIANS APP