When mass fraction of solute in a very dilute solution is doubled, its mole fraction is — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

For very dilute solutions, mole fraction $X \approx \frac{n}{N}$. Since mass fraction is proportional to mass of solute, doubling it doubles the moles of solute, and hence roughly doubles the mole fraction. Therefore, correct answer is A.