Question

39. In a binary solution, the mole fraction of a solute is 0.4. If the number of
moles of the solute is 0.2, the number of moles of the solvent is
(A) 0.3
(B) 0.6
(C) 0.3
(D) 0.4
​

Answer 1

so the answer is 0.3.

formula used is

X absolute = no of moles of solute/no of moles of solute+no of moles of solvent.