Weighed salts Y and Z were left exposed in the laboratory overnight. In the morning Y had gained weight, and Z had become liquid. What conclusion could be drawn about the nature of the two salts?
- Z is efflorescent
- Y and Z are efflorescent
- Y and Z are deliquescent
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Y and Z are hygroscopic
- Y is deliquescent
The correct answer is: D
Explanation
A deliquescent compound is a compound that, on exposure to the atmosphere, tends to absorb moisture from the atmosphere in large quantities. Hence, Y and Z are hygroscopic. Deliquescent materials are sufficiently hygroscopic and dissolve in the water they absorb, forming an aqueous solution.