Final answer:
Water (H2O) is an example of a colorless, liquid neutral oxide; it has a neutral pH, does not form salts with acids or bases, and is colorless in liquid form.
Step-by-step explanation:
An example of a colorless, liquid neutral oxide is water (H2O). Neutral oxides are oxides that neither show acidic nor basic properties and do not form salts when reacted with acids or bases. Water fits this definition as it is indeed colorless in its liquid state, has a neutral pH of approximately 7, and does not change its state of oxidation when forming compounds. Nitric acid (HNO3), while a colorless liquid in its pure form, is not a neutral oxide as it is a strong acid and hence does not meet the criteria.