Question

is it possible that the same material may undergo reversible and Irreversible changes give two examples in support of your answer

Answer 1

(1)Digestion:
Physical change :food is physically broken down by chewing
Chemical change:breakdown by saliva and enzyme
(2)candle:
Physical change: melting of wax
Chemical change: combusting
(Physical change=reversible, chemical change=irreversible)
Hope it works for you

Answer 2

Yes,it is possible for a same material to undergo in both reversible and irreversible changes.

For example:

1) Iron:

Reversible: If we melt and remould the iron then it will be considered as a reversible process.

Irreversible: If the iron gets in contact with moisture and gets rusted ,then it will be considered as the irreversible change.

2) Wax:

Reversible : If we slowly melt down the wax ,it will become solid again after cooling.

Irreversible : If we burn wax candle most of the wax will either evaporate or becomes carbon dioxide and other gases.

And many more.