Question

Give an example of a chemical reaction for the following situation: Gas is evolved.

Answer 1

Combustion reaction:-

1. It is a type of reaction where, a substance burns in presence of oxygen, producing Carbon dioxide gas, heat, and light as its products.
2. For example burning of Methane$\left({\mathrm{CH}}_4\right)$ produces Carbon dioxide and water vapor.
3. The gas that evolved here in this reaction is Carbon dioxide$\left({\mathrm{CO}}_2\right)$
4. The balanced reaction is as follows:

$\underset{\mathrm{Methane}}{{\mathrm{CH}}_4\left(\mathrm{g}\right)}+\underset{\mathrm{Oxygen}}{2{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}+\underset{\mathrm{Water}\mathrm{vapour}}{2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)}$

Therefore, combustion of Methane produces Carbon dioxide gas