Question

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky.The solution contains:

Answer 1

a solution reacts with crushed egg shell to give a gas turns limewater milky the solution contains carbon dioxide gas

Answer 2

Question :

A solution produces a gas by reacting with egg shells, which turns lime water to milky. What will happen in this solution?  

ANSWER :

Hydrogen chloride

Lime water turns milky and hence the gas is carbon-dioxide.

We already know that egg shells contain calcium carbonate .

Hence the only thing that can displace is HCl .

Thus the answer is HCl as only an acid can perform the above reaction and displace the calcium carbonate to liberate an acidic gas.

Reaction :

CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂