Question

Which of the following equations describe a single -replacement reaction

A.) CI2 + 2KI > 2KCI + I
B.) H2 + Br2 > 2HBr
C.) 2N + CI2
D.) 2N2O5 > O

Answer 1

The equation that describes a single-replacement reaction is A. Cl2 + 2KI → 2KCl + I2, where chlorine replaces iodine in potassium iodide.

Step-by-step explanation:

The equation that describes a single-replacement reaction is A. Cl2 + 2KI → 2KCl + I2. In this reaction, chlorine (Cl2) is replacing iodine (I) in potassium iodide (KI) to form potassium chloride (KCl) and iodine (I2). This fits the definition of a single-replacement reaction, where one element displaces another element in a compound. Options B, C, and D do not represent single-replacement reactions; B is a combination reaction, C is missing products and appears to be incomplete, and D is a decomposition reaction.