1.
Consider the following reactions.

X+Y⇌XYK1=[XY][X][Y]X + Y \rightleftharpoons XY \qquad K_1 = \dfrac{[XY]}{[X][Y]}


XY+Y⇌XY2K2=[XY2][XY][Y]XY + Y \rightleftharpoons XY_2 \qquad K_2 = \dfrac{[XY_2]}{[XY][Y]}


XY2+Y⇌XY3K3=[XY3][XY2][Y]XY_2 + Y \rightleftharpoons XY_3 \qquad K_3 = \dfrac{[XY_3]}{[XY_2][Y]}


On the basis of the reactions above, which of the following is correct?