Among the following physical changes are

i) Souring milk, cooking an egg

ii) Baking a cake, boiling water

iii) Melting an ice cube, sublimation of dry ice

iv) All the above 

Physical change is a change where no new substance is formed.

Souring milk, cooking an egg, and baking a cake $\Rightarrow$ Examples of chemical changes

Boiling of water, melting an ice cube, sublimation of dry ice

$\Rightarrow$ Examples of physical changes.