The process by which a substance absorbs moisture upon exposure to the atmosphere is called? A) Deliquescence B) Efflorescence C) Dehydrogenation D) Desalination Related MCQs: The process by which a substance absorbs moisture on exposure to the atmosphere is called? How many awards of Nishan-e-Haider were conferred upon brave Pakistan soldiers who embraced Shahadat during the 1971 war? Gradual exposure to actual feared situation is called: Which layer of the atmosphere is mainly responsible for weather process?