Question

Give reason for supporting that the water is a compound and not a mixture

Answer 1

water iss a compound not a mixture because-:
•water is make by combination of two element with their fix propertion by mass.
•it is make by fixed propertion by mass of hydrogen and oxygen.
•their ratio are 1:8.

Answer 2

Water is considered as a compound because of the following reasons:

1- Water cannot be separated into it's constituents, hydrogen and oxygen, by the physical methods (such as filtration, evaporation, distillation, etc.)

2- The properties of water are entirely different from those of it's constituents, hydrogen and oxygen. For example, water is a liquid whereas hydrogen and oxygen are gsses.; Water doesn't burn whereas hydrogen burns;, water doesn't support combustion whereas oxygen supports combustion.

3- Heat and light are given when water is prepared by burning hydrogen in oxygen.

4- The composition of water is fixed. It contains hydrogen and oxygen combined together in a fixed proportion of 1:8 by mass. It has a definite formula, H2O.

5- Water has a fixed boiling point of 100°C under standard atmospheric pressure.

Hope this helps!!!