A "chemical property" of a mineral is evident if the mineral "bubbles when acid is placed on it".
Explanation:
If a mineral specimen "breaks easily" when struck with a hammer, it exhibits the 'physical property' of the mineralrelated to the strength of the mineral.
If a mineral is easily "scratched by a fingernail", it shows that the mineral bears least abrasive strength, which is again a physical property.
If a mineral "reflects light from its surface", the features of its outer physical composition can be deduced, not its chemical composition.
