Answer:
CaO - inorganic
C₂H₄(OH)₂ - organic
Ca(OH)₂ - inorganic
CH₄ - organic
NaCl - inorganic
C₃H₈ - organic
Explanation:
Organic compounds have carbon (C) in it.
For example, CaO has calcium and oxygen, but no carbon so it's an inorganic compound. However, C₂H₄(OH)₂ does have carbon, making it an organic compound.
