Answer
Oxygen solubility in water decreases with increasing temperature; therefore, when the man boiled the water, he greatly diminished the amount of Oxygen in the water. Since water was cooled quickly, Oxygen didn't have time to re-dissolve again and hence, what finally killed the fish was the lack of Oxygen.
Work Step by Step
Oxygen solubility in water decreases with increasing temperature; therefore, when the man boiled the water, he greatly diminished the amount of Oxygen in the water. Since water was cooled quickly, Oxygen didn't have time to re-dissolve again and hence, what finally killed the fish was the lack of Oxygen.