Answer:
[tex]Ce_2(SeC_4)_2[/tex] is least soluble at high temperatures.
Step-by-step explanation:
The compound that has least solubility when the temperature increases is the one that has the least value along y-axis (solubility) for greater values along x- axis (temperature).
From the graph we see that [tex]KNO_3[/tex] is most soluble at high temperatures (in fact its solubility increases with increase in temperature), and [tex]Ce_2(SeC_4)_2[/tex] is least soluble for high temperatures (its solubility decreases with increase in temperature) .
Thus, [tex]Ce_2(SeC_4)_2[/tex] is least soluble at high temperatures.
