Answer:
D = All of these
Explanation:
Physical properties:
Physical properties involve those properties which includes the state of matter.
For example,
Melting point, boiling point, freezing point, density, smell, color
In given example,
The density of gold is 19.32 g/mL
Melting point is 1064.58°C
Boiling point is 2807°C
All these are physical properties.
Chemical properties:
Chemical properties includes those properties which involves the chemical reaction
For example.
Flammability, reactivity, acidity, heat of combustion, toxicity etc.
The reaction of gold with oxygen:
Chemical equation,
3Au + O₂  →  Au₂O₃
