Question

which of the following is not evidence of a chemical reaction?
color change
spoiled food
melting
rust

Explanation:

A color change can be due to a chemical reaction as new substances with different colors form. Spoiled food is the result of chemical reactions like decomposition. Rust is a chemical reaction between iron and oxygen. Melting is a physical change where a substance changes from solid to liquid without forming a new substance.

Answer:

melting