Question 14
WaterA blue solid, T, which weighed 5.0 g was placed on a table. After 8 hours, the resulting pink solid was found to weigh 5.5 g. It can be inferred that substance T
- A.is deliquescent
- B.is hydroscopic
- C.has some molecules of water of crystallization
- D.is efflorescent
Show the answer and explanation
Answer: B (is hydroscopic)
Explanation
T gained mass by absorbing water vapour from the air, yet it was still a solid. Absorbing moisture without forming a solution is what a hygroscopic substance does.