Correct option is B
The
quick lime (calcium oxide, CaO) that comes directly from the kilns after the process of calcination is known as
lump lime. This form of lime is obtained by heating limestone (calcium carbonate) in kilns at high temperatures. The quick lime, also called lump lime, is highly reactive and needs to be slaked or hydrated before use. It is different from
hydrated lime, which is obtained after slaking with water, and
hydraulic lime, which sets underwater.
Milk lime refers to lime dissolved in water (lime water).
