Question
GeneralGeneralGeneral

What is a pure substance?

Verified Answer

A pure substance is a material that consists of only one type of particle and has a fixed composition and definite properties throughout. It cannot be separated into simpler substances by physical methods.

Types of pure substances:

  • Elements: Iron (Fe), Oxygen (O₂), Gold (Au)

  • Compounds: Water (H₂O), Carbon dioxide (CO₂), Sodium chloride (NaCl)

Pure substances have uniform composition and characteristic melting and boiling points, which help distinguish them from mixtures.