Question

A calcium compound X on heating form a white solid Y and gas Z .X also reacts with dilute acid to form a gas Z which turns milky.The white solid Y dissolves in water forming colorless solution which turns universal indicator blue. Write an equation for "x" to Y and Z

Answer 1

X - Calcium Carbonate (CaCO3)
Y - Calcium oxide (CaO)
Z - Carbon dioxide (CO2)
The base formed when Y is dissolved in water - Calcium hydroxide (CaOH)

Answer 2

CaCO3 > CaO+CO2

Calcium Carbonate on heating gives Calcium Oxide and Carbon dioxide. Solution of Calcium Oxide Is Basic In nature as it Universal Indicator blue.Carbon dioxide turns lime water milky
Therefore
X- Calcium carbonate
Y- Calcium Oxide
Z- Carbon dioxide