Question

Solubility of CaO in water is:

• A. Chermic
• B. Endothermic
• C. Exothermic
• D. Hypothermic

Hint:

Exothermic reactions release heat, and the dissolution of CaO in water is an example of such a reaction.

Answer 1

The Correct Option is C

Solubility of CaO in water is: 

• Option 1: Chermic - This is not a correct term related to solubility or dissolution processes. It appears to be a typographical error.
• Option 2: Endothermic - This is incorrect. An endothermic process absorbs heat, but the dissolution of CaO in water releases heat.
• Option 3: Exothermic - This is the correct answer. When calcium oxide (CaO) dissolves in water, it reacts exothermically, releasing a significant amount of heat and forming calcium hydroxide (Ca(OH)2).
• Option 4: Hypothermic - This is not a recognized term in chemistry related to the dissolution process.

Explanation:

The dissolution of calcium oxide (CaO) in water is an exothermic process, meaning that it releases heat. The reaction produces calcium hydroxide (Ca(OH)2) and is highly exothermic, making it feel hot to the touch.