Question 31
WaterWhich of the following compounds will form a solution if exposed to air?
- A.Na2CO3.10H2O
- B.NaNO3
- C.CuSO4
- D.CaCl2
- E.Na2SO4.10H2O.
Show the answer and explanation
Answer: D (CaCl2)
Explanation
Anhydrous calcium chloride is deliquescent: it absorbs so much water vapour from the air that it dissolves to form a solution.