Concept:A physical change affects only the physical state or appearance of a substance, without changing its chemical composition.
Explanation:When ice melts, it changes from solid water to liquid water.
In both states, the chemical formula remains
H2​O.
No new substance is formed during this change.
The process is reversible because water can be frozen back into ice.
Therefore, melting of ice is a physical change.
On the other hand, setting milk into curd, ripening of fruits, and fermentation of grapes all produce new substances with different chemical compositions.
These are chemical changes.
Answer:Option A: Melting of ice.