Here's why:

* No carbon backbone: Inorganic compounds generally lack a carbon backbone, which is a defining characteristic of organic compounds.

* Simple structure: Water has a simple molecular structure consisting of two hydrogen atoms bonded to one oxygen atom.

Other examples of inorganic substances include:

* Salt (NaCl)

* Iron (Fe)

* Carbon dioxide (CO₂)

* Limestone (CaCO₃)

* Glass