Which fo the follwing decomposition reactions is not a redox reaction ?

Options

A. `CaCO_(3)(s) overset(Delta)(rarr) CaO(s) +CO_(2)(g)`
B. `2 KClO_(3)(s) overset(Delta)(rarr) 2KCl(s) +3O_(2)(g)`
C. `2 NaH(s) overset(Delta)(rarr) 2Na(s)+H_(2)(g)`
D. `2 H_(2)O(s) rarr 2H_(2)(g) +O_(2)(g)`

Answer

A

Explanation

Specifically a decomposition reaction is the breakdown of a compound into two or more components :
` C rarr A+B`
If either A or B both A and B are in the elemental state, then the reaction is redox in nature. Thus, all decomposition reactions which yield at least one element as a product are redox reactions. Reaction (1) is not a redox reactions because both the products of the reaction are compounds.