Stoichiometry
The equilibria relations in a multicom-ponent and multiphase system can not be calculated with the help of the

Experimental data
Theoretical equations
Emperical equations
Phase rule

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Stoichiometry
Pick out the wrong statement about the recycle stream in a process.

The ratio of the quantity of a reactant present in the reactor feed of a recycling operation to the quantity of the same reactant entering the process as fresh feed is called combined feed ratio
Recycling is exemplified by refluxing back a part of the distillate to the distillation column to maintain the quantity of liquid within the column
Recycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants
Recycling in a process does not help in getting higher extent of reaction

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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.

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

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