Carbon dioxide turns the lime water milky due to the formation of

Solid calcium oxide was taken in a container and water was added slowly to it.
State the two observations made in the experiment.

Solid calcium oxide was taken in a container and water was added slowly to it.

Write the name and the chemical formula of the product formed.

Write the balanced chemical equation for the following reaction:

Zinc carbonate (s) $\to$Zinc oxide (s) + Carbon dioxide (g).