Question

4). Which one of the following reactions is an example of decomposition reaction? (a) C +
O2 =CO2 (b)Ca0+ H2O =Ca(OH)2 (c) CaCO3= CaO+CO2 (d)2H2 +02 = 2H2O​

Answer 1

Answer:

CaCO3= CaO+CO2

Explanation:

Answer 2

An example of a decomposition reaction is as follows-

$CaCO_3\rightarrow CaO+CO_2$.

• The reaction where a reactant decomposes to give products is called the decomposition reaction.
• From the above options, only the reaction $CaCO_3\rightarrow CaO+CO_2$ is a decomposition reaction as here the reactant calcium carbonate decomposes to give products that are carbon dioxide and calcium oxide.
• Hence the correct option is c.