Which statement is true regarding single displacement reactions?

Which statement is true regarding single displacement reactions?

• A. They can only occur between metals
• B. They always release energy
• C. They involve a more reactive element replacing a less reactive element
• D. They typically produce two products

Answer: (C)

In single displacement reactions, a more reactive element indeed replaces a less reactive element in a compound. This principle is based on the reactivity series, which ranks elements according to their ability to displace others from compounds. For instance, if we were to have a reaction where a more reactive metal, like zinc, displaces a less reactive metal, like copper, from a copper salt solution, this confirms the validity of the statement. The nature of single displacement reactions ensures that the reactivity of elements governs the replacement process. Thus, the emphasis on a more reactive element displacing a less reactive one is fundamental to understanding how and why these reactions occur. Other statements do not fit the characteristics of single displacement reactions. While they may involve various types of reactants or produce energy, these conditions are not universal to all single displacement reactions. For example, these reactions can occur with metals and sometimes with nonmetals, and they do not always result in products that release a significant amount of energy. Moreover, while it is common for single displacement reactions to produce two products (the new compound and the displaced element), this is not a defining characteristic, as the number of products can vary depending on the specific reaction.

In single displacement reactions, a more reactive element indeed replaces a less reactive element in a compound. This principle is based on the reactivity series, which ranks elements according to their ability to displace others from compounds. For instance, if we were to have a reaction where a more reactive metal, like zinc, displaces a less reactive metal, like copper, from a copper salt solution, this confirms the validity of the statement.

The nature of single displacement reactions ensures that the reactivity of elements governs the replacement process. Thus, the emphasis on a more reactive element displacing a less reactive one is fundamental to understanding how and why these reactions occur.

Other statements do not fit the characteristics of single displacement reactions. While they may involve various types of reactants or produce energy, these conditions are not universal to all single displacement reactions. For example, these reactions can occur with metals and sometimes with nonmetals, and they do not always result in products that release a significant amount of energy. Moreover, while it is common for single displacement reactions to produce two products (the new compound and the displaced element), this is not a defining characteristic, as the number of products can vary depending on the specific reaction.