20june2019 paper1 Q49
0. With the increase in temperature, the dissolved oxygen content in a water body will:
- Option : A
- Explanation : Dissolved oxygen refers to the level of free, non·compound oxygen present in water or other liquids. It is an important parameter in assessing water quality because of its influence on the organisms living within a body of water. The actual amount of dissolved oxygen (in mg/L) will vary depending on temperature, pressure and salinity. The solubility of oxygen decreases as temperature increases. This means that warmer surface water requires less dissolved oxygen to reach 100% air saturation than does deeper, cooler water.
