Question

which of these is an example of a physical change? a banana ripening in the air hydrogen burning in the air zinc reacting with an acid liquid water turning into vapor

Explanation:

A physical change is a change in which the substance's chemical composition remains the same. When liquid water turns into vapor, it is just a change of state from liquid to gas. The water molecules remain H₂O throughout. A banana ripening is a chemical change due to enzyme - catalyzed reactions. Hydrogen burning and zinc reacting with an acid are chemical reactions where new substances are formed.

Answer:

D. liquid water turning into vapor