nx mole of substance x was dissolved in ny mole of substance y.A. The total of mole fractions of substance x and y remain 1.B. Mole fraction of \(\rm x=\dfrac{\rm No. \ of \ moles \ of \ x}{\rm No. \ of \ moles \ of \ solution}\)C. Mole fraction of \(\rm y = \dfrac{n_y}{n_x + n_y}\)D. Mole fraction of \(\rm x = \dfrac{n_x}{n_y + n_y}\)

nx mole of substance x was dissolved in ny mole of substance y.A. Th

1.	nx mole of substance x was dissolved in ny mole of substance y.A. The total of mole fractions of substance x and y remain 1.B. Mole fraction of \(\rm x=\dfrac{\rm No. \ of \ moles \ of \ x}{\rm No. \ of \ moles \ of \ solution}\)C. Mole fraction of \(\rm y = \dfrac{n_y}{n_x + n_y}\)D. Mole fraction of \(\rm x = \dfrac{n_x}{n_y + n_y}\)
A.	Only A
B.	Only A, B
C.	A, B and C
D.	Only D
Answer» D. Only D