which one of the following compounds is soluble in water?

Question

A. LiCl

B. AgCl

C. CaSO₄

D. PbCO₃

E. Cu(OH)₂

Answer 1

If you go by the solubility rules for Common Ionic Compounds in Water, the only one that is soluble in Water is LiCl, which is answer A.

All of the other compounds are insoluble in water.

You can probably find a table of these solubility rules in your chemistry textbook.