1) Burning of matchstick : Irreversible change
2) Changing of season : Reversible
3) Souring of milk : Irreversible
4) Digestion of food : Irreversible
5) Blinking of eyes : Reversible
6) Melting of ice : Reversible
7) Cooking of food : Irreversible
8) Growing of seedling : Irreversible
9) Ripening of fruits : Irreversible