CaO is what?
CaO is commonly known as quick lime.
For details you may refer to the following link:
https://www.meritnation.com/ask-answer/question/what-is-quick-lime/atoms-and-molecules/512771
For details you may refer to the following link:
https://www.meritnation.com/ask-answer/question/what-is-quick-lime/atoms-and-molecules/512771