Question

Give few examples of physical change where the original form is not regained by the object.

Answer 1

Here are the examples:
-Ice melting to water.
-A can being crushed to became shapeless.
-Water evaporating to form gas.
-A piece of glass breaking into pieces.
-Boiling of meat to make it tender.

Answer 2

Water boiling into vapour.  Sweat getting evaporated.  Metals getting pressed, drawn into wires, containers.

Tungsten filament in a bulb becoming red and getting broken if there is an overload.  a broken remote or cell phone.
A punctured balloon.