Name the cause of change which takes place during the :
- Conversion of ice into water
- Conversion of water into hydrogen and oxygen
- Formation of image of a person on a photographic film
- Bending of iron rods to make an iron grille.
a. When ice is converted into water, heat is absorbed by ice.
b. Water splits into hydrogen and oxygen due to an electric current being passed through the wate r .
c. Photographic film captures the image formed by light reflecting from the surface being photographed.
d. Forcing the Iron rods to make an iron grille