Which of the following is not endothermic process?
a. Fusion b. Vapourisation
c. Temperature d. Insoluble heavy impurities.

Dear Student, please recheck your question and repost as the both a) and b) are endothermic processes as they absorb heat while c) and d) are not the processes at all. Temperature is a property and insoluble heavy metal impurities are added compounds. Kindly recheck. Regards