H₂O, is an example of

H₂O is a compound because, 1.The components hydrogen and oxygen cannot be separated by physical methods such as filtration, evaporation. 2.Hydrogen and oxygen are present in a fixed proportion of 1: 8. 3.Energy changes accompany the formation of a compound i.e., heat and light are given out. 4.Properties of water are entirely different from the constituents, hydrogen and oxygen. 5.The boiling point of water is 100^oC at 76 cm Hg i.e., one atmospheric pressure