Question

name a solution reacts with crushed egg-shells to give a gas that lime - water milky

Answer 1

Carbon dioxide is the gas that turn limewater milky and the solution that react is Hydrochloric acid

Answer 2

Hii There!!

The solution is Hydrochloric Acid (HCl)


Here is the chemical reaction taking place:-
CaCO3 + 2HCl ----> CaCl2 + H2O + CO2

Egg shells contains calcium carbonate, on reaction with HCl it liberates CO2 gas which turn lime water to milky.



Hope it helps