Question

which use of iron is due to its chemical properties?
producing colored sparks in fireworks
changing from liquid to gas at 2,862°c
conducting electricity and heat
changing from solid to liquid if heated to 1,538°c

Explanation:

• Chemical properties involve changes that result in new substances. Producing colored sparks in fireworks is a chemical reaction (iron reacting with other substances to produce light and color).
• Changing from liquid to gas (boiling point), conducting electricity and heat (physical conductivity), and changing from solid to liquid (melting point) are physical properties as they don't involve new substances being formed.

Answer:

producing colored sparks in fireworks