Dry ice is:
Question: Define dry ice.
Dry ice is solid carbon dioxide. It forms when carbon dioxide gas is cooled under high pressure until it solidifies. Its utility as a cooling agent stems from its sublimation point of -78.5°C (-109.3°F), where it transforms directly from solid to gas, bypassing the liquid phase. This characteristic, earning it the name "dry" ice, makes it suitable for applications requiring a non-liquid cooling medium.
| Option | Description |
|---|---|
| Lead monoxide | Incorrect. This is a compound of lead and oxygen. |
| Silicon carbide | Incorrect. This is a compound of silicon and carbon. |
| Solid carbon dioxide | Correct. This is the solid form of CO2. |
| Glacier ice | Incorrect. This is naturally occurring frozen water. |
Correct Answer: Solid carbon dioxide