The observation that a matter is odorless, colorless, melts at 0°C, and boils at 100°C allows us to infer that the substance is most likely water. These specific melting and boiling points are characteristic physical properties of pure water at standard atmospheric pressure. Water is known to be colorless and odorless in its liquid state, and it transitions from solid (ice) to liquid at 0°C and from liquid to vapor at 100°C

. From this observation, the following inferences can be drawn:

• The substance is pure or nearly pure, as the melting and boiling points are sharp and match those of pure water. Impurities typically alter these temperatures

• The phase changes at these temperatures indicate the substance undergoes physical changes without altering its chemical identity (melting and boiling are physical changes)

• The odorless and colorless nature suggests it is a simple molecular substance without strong color or smell, consistent with water

Thus, the key inference is that the matter described is water, and the given melting and boiling points are fundamental physical properties that can be used to identify it and confirm its purity.