Question

The reaction of calcium carbonate, with freshly prepared lime water, is shown below:

Answer the questions with the help of a diagram:

1. What type of reaction does calcium carbonate undergoes?
2. What change in colour is observed in lime?
3. Write the chemical equation.

Answer 1

1. Decomposition reaction. The chemical reaction in which two or more products are formed from a single reactant is called a decomposition reaction.
2. The resulting carbon dioxide gas makes the lime water milky.
3. \[\ce{CaCO3(s) ->[\Delta] CaO(s) + CO2 ^}\]