The most flood affected nation is:

The longest river in Kerala is:

Which are strong walls built across a river to hold back the flow of water?

Longest river in the world is:

An example for which don’t dissolve in water:

A clean looking water may contain :

Largest fresh water lake in India is:

During summer, the level of water in a river is:

During the rainy season, the level of water in a river is:

 If we put sugar into a glass of water it will: