Chemistry CFE Practice Test 2026 - Free Chemistry Exam Practice Questions and Study Guide

Indefinite shape and indefinite volume mean the particles are not bound to a fixed space and can spread to fill the available container. This is characteristic of a gas, where particles move freely, are far apart, and can be compressed or expanded to fill any space. Solids have definite shape and volume; liquids have definite volume but take the shape of their container; aqueous refers to a liquid solution, which still has a definite volume. So the state described is gas.