Question

How to find deliquescent compounds and which compound is deliquescent:-

a) Hg2Cl2

b) HgCl2

c) ZnCl2

d) CdCl2

Answer 1

C) ZnCl2

Zinc chloride and calcium chloride, as well as potassium hydroxide andsodium hydroxide (and many differentsalts), are so hygroscopic that they readily dissolve in the water they absorb: this property is called deliquescence.
Deliquescent materials are substances (mostly salts) that have a strong affinity for moisture and will absorb relatively large amounts of water from the atmosphere if exposed to it, forming an aqueous solutions. Deliquescent salts include calcium chloride, magnesium chloride, zinc chloride, ferric chloride, carnallite, potassium carbonate, potassium phosphate, ferric ammonium citrate, ammonium nitrate, potassium hydroxide, and sodium hydroxide.