WAEC - Chemistry (2001 - No. 44)
A substance is said to be hygroscopic if it absorbs?
water from the atmosphere to form a solution
heat from the surrounding
carbon (IV) oxide from the atmosphere
moisture from the atmosphere without dissolving
Giải thích
Hygroscopy is the phenomenon of attracting and holding water molecules via either absorption or adsorption from the surrounding environment,
which is usually at normal or room temperature.
Deliquescence, the process by which a substance absorbs moisture from the atmosphere until it dissolves in the absorbed water and forms a solution.