Question

give two examples of physical irreversible change

Answer 1

No it's not true physical changes are always reversible like melting of butter melting of ice etc they can be reversed

Answer 2

Physical Irreversible changes are the changes in physical property which cannot be reversed.
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like you can take the example of

cracking of the egg
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As this physical change is cannot be reversed or
it cannot be uncracked so this is also a physical Irreversible change.


cutting of hair
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like when we go to cut our hair then hair is cut it out and this physical change is happen
but this physical change is cannot be reversed.
that is we cannot then joint the hair ,so it is a physical Irreversible change.