is milk going sour a chemical or physical property

Question

is freezing water a chemical or physical property
is crumpling foil a chemical or physical property
is breaking a crayon a chemical or physical property

Answer 1

Milk going sour is a chemical property.

Freezing water is a physical property.

Crumpling foil is a physical property.

Breaking a crayon can be considered both a chemical and physical property, as it involves a change in the structure and composition of the crayon.