Which one is a sublime substance? A. Table salt B. Sugar C. Iodine D. Potassium Iodide

The correct answer is C. Iodine.

Sublimation is the process of a substance passing directly from the solid to the gaseous state without passing through the intermediate liquid state.

Table salt (NaCl) is a crystalline solid that melts at 801 degrees Celsius. When heated, it melts into a liquid and then boils into a gas.

Sugar (C12H22O11) is a crystalline solid that melts at 186 degrees Celsius. When heated, it melts into a liquid and then boils into a gas.

Potassium iodide (KI) is a crystalline solid that melts at 681 degrees Celsius. When heated, it melts into a liquid and then boils

Iodine (I2) is a solid that sublimes at 113.7 degrees Celsius. This means that when it is heated, it goes directly from a solid to a gas without melting.

Iodine is the only substance listed that sublimes.