Question

Which of the following statements, regarding the mole fraction $(x)$ of a component in solution, is incorrect?

• A. $0\le x\le 1$
• B. $x<1$
• C. $x$ is always non-negative
• D. None of these

Answer 1

Answer: (A)

Mole fraction of any component $A$ in solution
$x=\frac{\text{ No. of moles of }A}{\text{ Total No. of moles of solution }}$
As total no. of moles of solution $>$ No. of moles of $A$
Thus $x$ can never be equal to one or zero.