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CBSE Class 10 Science Question 2 of 34

Acids, Bases and Salts — Question 2

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Question

Question 2

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

  1. NaCl
  2. HCl
  3. LiCl
  4. KCl
Answer

HCl

Reason — Egg shells are made up of calcium carbonate and when calcium carbonate reacts with HCl it liberates CO2 gas which turns lime water milky.

CaCO3 + 2HCl ⟶ CaCl2 + H2O + CO2 ↑