At room temperature, paraformaldehyde exists in which state?

Paraformaldehyde exists as a solid at room temperature due to its chemical structure and properties. It is a polymerized form of formaldehyde and typically appears as a white, powdery substance or solid. When it is in its solid state, it is often used in the embalming process and other applications in the funeral service industry for its preservation qualities.

At room temperature, paraformaldehyde does not transition into a liquid or gaseous state without the application of heat or other conditions that change its physical state. Understanding this property is essential for those working with chemicals in funeral service, as it helps inform proper handling, usage, and storage.

The other states listed in the choices—gas, liquid, and aqueous—do not accurately describe paraformaldehyde under normal room temperature conditions, thus solidifying its classification as a solid in this context.