NCERT Question 2 (MCQ) - Chapter 2 Class 10 - Acids, Bases and Salts

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

Answer:

(b) HCl

Explanation

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.