Final answer:
The second neutralization reaction in the soda lime reaction is the formation of calcium carbonate (CaCO3), which is option b.
Step-by-step explanation:
In the soda lime reaction, the step known as the second neutralization reaction is the formation of calcium carbonate (CaCO3), which corresponds to option b) Formation of calcium carbonate (CaCO3). This step occurs after the formation of solid calcium hydroxide from the reaction of solid calcium oxide with water, which is not considered a neutralization.
The neutralization typically involves the reaction of an acid and a base to form water and a salt. In the context of the soda lime reaction, when carbon dioxide reacts with calcium hydroxide, calcium carbonate and water are formed, representing the neutralization process.