Stoichiometry
The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfies

XM = 0.5
0.5 < XM < 0.64
XM < 0.5
XM ≥ 0.64

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

Recycling in a process does not help in getting higher extent of reaction
Recycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants
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

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