Answer: Option (b) is the correct answer.
Explanation:
A physical property is defined as a property that does not change the chemical composition of a substance.
For example, boiling point, melting point, density, mass etc are all physical properties.
Whereas a chemical property is defined as a property that bring chemical changes in a substance.
For example, silver tarnishes when it comes into contact with hydrogen sulfide in the air is a chemical property. This is because due to chemical reaction with hydrogen sulfide and air there occurs tarnishing in silver.
Hence, we can conclude that given example is a chemical property.
