Question

which is an example of a chemical change? a) sublimation b) electrical conductivity c) melting d) combustion

Explanation:

A chemical change results in a new substance being formed. Sublimation is a physical change where a solid turns directly into a gas. Electrical conductivity is a physical property. Melting is a physical change from solid to liquid. Combustion is a chemical reaction where a substance reacts with oxygen to produce heat, light and new substances like carbon - dioxide and water.

Answer:

D. combustion