India's longest lake is:

A small machine which is used to clean water in home:

The dirty water look :

What is the taste of sea water?

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

The most flood affected nation is:

Things which don't dissolve in water will stay:

What is used to clean the water in the well?

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

The best and simple method of cleaning water is: