The property of calcium chloride which makes it useful as a drying agent is that it is
Answer Details
Calcium chloride is a deliquescent salt, which means it can absorb moisture from the air and turn into a liquid. This property makes it useful as a drying agent because it can remove moisture from the surroundings and keep the environment dry. When calcium chloride is added to a container with a moist substance, it absorbs the moisture and forms a liquid solution. This makes it effective in preventing the formation of rust, as well as in the drying of gases and solvents. Therefore, the correct answer is "deliquescent".