Water is the most common substance on the earth. The natural sources of water are rain, rivers, lakes, springs, sea, wells, etc. Rainwater is regarded as one of the purest forms of naturally occurring water. Rain is produced by the condensation of the water vapour present in the air. Nearly one-third of the rainwater sweeps into the ground through soft and loose strata of sand, gravel and chalk and then reaches some impermeable stratum of clay and slate. It remains trapped in this layer and tries to escape out through the small cracks of rocks which we call spring. The water in the well is one example of trapped water below the ground. Water from wells has been used from time immemorial for drinking and irrigational purposes.
Physical properties of water
Chemical properties of water
The natural sources of water are rain water, rivers, lakes, springs, sea, wells, etc.
Rainwater is regarded as one of the purest form of naturally occurring water.
The physical properties of water are:
The chemical properties of water are:
The melting and boiling point of water is 0oC and 100oC.
Water is composed of two atoms of hydrogen and one atom of oxygen (H2O).
Purest form of water resource is ______.
Temperatures of ______ are required to break the hydrogen bonds.
Water is ______ substances.