Question

when the gas formed on heating limestone is passed through freshly prepared lime water, the lime water turns milky

Answer 1

It is carbon dioxide gas

IT is formed on mixing vinegar and baking soda

THIS IS THE CORRECT ANSWER SO MARK BRAINLIEST ✌️

Answer 2

Answer:

The reason behind the milky transformation of lime water after heating it with Carbon dioxide is as follows.

$\mathrm{CaCO}_{3} \quad \longrightarrow \mathrm{CaO}+\mathrm{CO}_{2}$

$\mathrm{CO}_{2}+\mathrm{Ca}(\mathrm{OH})_{2} \longrightarrow \mathrm{CaCO}_{3} \downarrow+\mathrm{H}_{2} \mathrm{O}$

When the above reaction takes place, it leads to the formation of a precipitate of the insoluble milky Calcium Carbonate. This is the reason behind the turning of lime water as milky.

Thus, the formation of insoluble precipitate turns the lime water into milky.