Question

A decomposition reaction is generally exothermic.

• A. True
• B. False

Answer 1

The correct option is B False

1. A Decomposition reaction involves breaking of bonds which requires energy.
2. Therefore, they are generally endothermic in nature.
3. The decomposition reactions are usually endothermic as heat is required to break chemical bonds in the compound undergoing decomposition.
4. For example: $$\begin{gathered} {\mathrm{N}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\stackrel{\mathrm{Heat}}{\to }2\mathrm{NO}\left(\mathrm{g}\right) \\ \left(\mathrm{Nitrogen}\right)\left(\mathrm{Oxygen}\right)(\mathrm{Nitric}\mathrm{oxide}) \end{gathered}$$

Therefore, the given statement - A decomposition reaction is generally exothermic is false.