List of top Chemistry Questions on Water pollution

The BOD of highly polluted water is

The water quality of a pond was analysed and its BOD was found to be 4. The pond has

The eutrophication of water body results in:

Given below are two statements :
Statement I: In polluted water values of both dissolved oxygen and BOD are very low.
Statement II: Eutrophication results in decrease in the amount of dissolved oxygen.
In the light of the above statements, choose the most appropriate answer from the options given below :

The concentration of dissolved oxygen $(DO)$ in cold water can go upto :

The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be $1000 \,ppb$, $40\, ppb$, $100\, ppm$ and $0.2\, ppm$, respectively. This water is unsuitable for drinking due to high concentration of :