Check sibling questions

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:

 

Acid + Metal Carbonate → Salt + Carbon Dioxide + Water

2HCl(aq) + CaCO 3 (s)  →  CaCl 2 (aq)+ H 2 O(l) + CO 2 (g)

 

Hence the solution contains HCl and option b is correct.

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CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo