Question

Which of the following reactions is a redox reaction?

double-replacement

acid-base

single-replacement

Answer 1

A single-replacement reaction is a redox reaction because it involves the transfer of electrons, leading to a change in oxidation states of the elements involved.

Step-by-step explanation:

Among the given types of reactions, a single-replacement reaction is a redox reaction. In single-replacement reactions, an element in a compound is replaced by another element. A common example is when a metal in a compound is replaced by another metal, or when a nonmetal is replaced by another nonmetal. This involves the transfer of electrons from one element to another, indicating a change in oxidation states, which is characteristic of redox reactions.

Conversely, double-replacement reactions involve the exchange of ions between two compounds without any change in oxidation state, so they are generally not redox reactions. Similarly, acid-base reactions involve the transfer of a proton (H+) and do not necessarily involve a change in the oxidation states of the substances involved, so they are also typically not redox reactions.

Answer 2

Answer : Option C) Single-replacement reactions.

Explanation : Except combustion reactions where the reductant like fuel and oxidant often is molecular oxygen which reacts vigorously to produce significant amounts of heat, and light, in the form of a flame. This is a kind redox reactions.

But here amongst the given options, single-replacement reactions are redox reactions. As these are the reactions where an ion in solution is usually displaced via the oxidation of a metallic element species. The common example is the acid oxidation of certain metallic element.