A solution reacts with crushed egg-shells to give a gas that turns limewater milky.
The solution contains
(a) NaCl (b) HCl
(c) LiCl (d) KCl
Egg Shells are made of CaCO 3 (Calcium Carbonate). CO 2 is the gas which turns lime water milky. Hence, one of the reactants is CaCO 3 and one of the products is CO 2 .
We know that CO 2 is produced when Metal Carbonates react with Acid.
Hence, the reaction would be:
Hence the solution contains HCl and option b is correct.