On heating,calcium carbonate gets converted into calcium oxide and carbon dioxide.
$(a)$ Is this a physical or a chemical change?
$(b)$ Can you prepare one acidic and one basic solution by using the products formed in the above process? If so,write the chemical equations involved.

(N/A) This is a chemical change because a new substance is formed and the process is irreversible under normal conditions.
$(b)$ Yes,acidic and basic solutions can be prepared by dissolving the products in water:
$1.$ Basic solution: Calcium oxide $(CaO)$ reacts with water to form calcium hydroxide $(Ca(OH)_2)$,which is basic in nature.
$CaO + H_2O \rightarrow Ca(OH)_2$
$2.$ Acidic solution: Carbon dioxide $(CO_2)$ reacts with water to form carbonic acid $(H_2CO_3)$,which is acidic in nature.
$CO_2 + H_2O \rightarrow H_2CO_3$