Which one of the following should contain maximum DO?ans.Lakemolten glacier and ice capsGround waterRiver Previous Marked for Review Next

The question seems to be asking which of the following should contain the maximum Dissolved Oxygen (DO):

1. Lake
2. Molten glacier and ice caps
3. Ground water
4. River

Dissolved Oxygen (DO) is the amount of oxygen that is present in water. It is an important measure of water quality as it indicates a water body's ability to support aquatic life.

Here's a step-by-step analysis:

1. Lake: Lakes, especially those that are stagnant, may have lower levels of DO because there is less movement to facilitate oxygen dissolution.

2. Molten glacier and ice caps: Cold water can hold more dissolved oxygen than warm water. So, molten glaciers and ice caps might have high levels of DO.

3. Ground water: Groundwater typically has lower DO levels because it is not exposed to the atmosphere and therefore, has less opportunity to dissolve oxygen.

4. River: Rivers often have high levels of DO because they are constantly moving, which helps to dissolve more oxygen.

So, based on this analysis, the molten glacier and ice caps should contain the maximum DO.