Question

1. which of the following is an example of a chemical process? (a) helium mixes with neon. (b) iron forms rust. (c) sugar dissolves in water. (d) ice melts.

Explanation:

A chemical process involves a change in the chemical composition of a substance. Helium - neon mixing is a physical combination. Sugar dissolving in water and ice melting are physical changes where the substances' chemical identities remain the same. Rusting of iron is a chemical reaction where iron reacts with oxygen and moisture to form iron oxide.

Answer:

B. Iron forms rust.