Question

When blood passes through the lungs, carbon dioxide and water are formed from carbonic acid dissolved in the blood. The carbon dioxide formed passes into the lungs and is exhaled. H2CO3 H2O + CO2 What kind of reaction has occurred?

Answer 1

Answer : A decomposition reaction has occurred.

Explnataion :

In the lungs, carbonic acid in the blood dissociates into carbon dioxide and water.

The chemical equation for this reaction can be written as ,

$H_{2} CO_{3} (aq) \rightarrow H_{2}O (l) + CO_{2} (g)$

In the above equation, we can see that the reactant H₂CO₃ is getting separated into 2 products H₂O and CO₂.

This is an example of decomposition reaction.

Decomposition reaction is a type of reaction in which only one reactant forms 2 or more products. The reaction is often endothermic as it involves breaking of bonds.

Therefore we can say that , a decomposition reaction has occurred inside the lungs.