Question

which is an example of a chemical reaction? a) sugar dissolving in water b) ice melting c) water evaporating d) iron rusting

Explanation:

A chemical reaction results in the formation of new substances. Sugar dissolving, ice melting, and water evaporating are physical changes where no new substances are formed. Iron rusting is a chemical reaction as iron reacts with oxygen and moisture to form iron oxide (rust), a new substance.

Answer:

D. iron rusting