Which of the following terms is used to describe the property of a substance to absorb moisture from the air on exposure?

Options :
  1. Osmosis
  2. Desiccation
  3. Efflorescence
  4. Deliquescence
Answer and Explanation :-

Answer: Option 4


Deliquescence is the process by which a substance absorbs moisture from the atmosphere on exposure until it dissolves in the absorbed water and forms a solution. Deliquescence occurs when the vapour pressure of the solution that is formed is less than the partial pressure of water vapour in the air. All soluble salts will deliquesce if the air is sufficiently humid. A substance that absorbs moisture from the air but not necessarily to the point of dissolution is called hygroscopic.

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : Which of the following famous scientists measured the speed of light?

Next Question : The presence of which of the following gases in air makes Brass discoloured?

Click here for online test on General Science


 (Getemail alerts when others member replies)

Perhaps I know best why it is man alone who laughs he alone suffers so deeply that he had to invent laughter.
-Friedrich Nietzsche