Slaking is the process, by adding water, turning the CaO into:
Ca (HCO3)2
CaCO3
Ca(OH) 2
All of these
Slaking of lime (CaO) -
Addition of limited amount of water which breaks the lump of lime.
Addition of H2O to CaO forms Ca(OH)2 which is called slaked lime and the process is called as Slaking
Therefore, option(3) is correct.