Which of the following compounds is the least soluble in water? by Sunday | Dec 10 | Chemistry WAEC | 0 comments A. CaCl2 B. CaSO4 C. NaCl D. Na2SO4 Correct Answer: Option B B. CaSO4 Users Also Read These:Sulphur is soluble in ethanol but not in water while…Methanoic acid mixes with water in all proportions…A tap supplies water at 26°C while another supplies…Which of the following salts is slightly soluble in water?Vitamin C which is water soluble is?