Which one of the following should contain maximum DO?ans.LakeGround watermolten glacier and ice capsRiver 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. Groundwater
3. Molten glacier and ice caps
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. Lakes: Lakes, especially those that are stagnant, may have lower levels of DO because there is less movement to facilitate oxygen dissolution.

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

3. Molten glacier and ice caps: Glacial meltwater can have high levels of DO because cold water can hold more dissolved oxygen than warm water. However, once the ice melts, the water may not be reoxygenated until it returns to the ocean and comes into contact with the atmosphere again.

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

So, out of the options given, rivers should typically contain the maximum Dissolved Oxygen (DO). However, it's important to note that many factors can influence DO levels, including temperature, salinity, pressure, and biological activity.