Solve the riddle using the given clues:
Sheela got a chocolate by identifying a correct unknown substance using the hints below. What is the name of the substance she answered, find this using the below puzzle.
"X is a white powder.
Farmers add it to soil to reduce acidity.
It improves crop growth.
It is basic in nature.
It is also used to prepare limewater".
Identify X.
"X is a white powder.
Farmers add it to soil to reduce acidity.
It improves crop growth.
It is basic in nature.
It is also used to prepare limewater".
Identify X.
You're a .