👉 In the context of chemistry and physics, an "unreactive" substance is one that does not undergo any chemical reactions or changes upon exposure to a certain set of conditions. This means that it does not undergo any change in its composition, physical properties, or behavior when exposed to these conditions. For example, in a laboratory setting, a substance that cannot be used as an absorbent for urine due to its high solubility and can only dissolve small amounts of water is considered unreactive
