Question

Redox Ex

20. Which reaction is an example of oxidation-reduction?
1) KOH + HCl → KCl + H₂O
2) 2 KCl → 2 K + Cl2
3) BaCl2 + K2SO4 → 2 KCl + BaSO4
4) KCl + AgNO3 → AgCl + KNO3

Answer 1

Answer: 2 KCl → 2 K + Cl2

Step-by-step explanation:

An oxidation-reduction (or redox) reaction involves a transfer of electrons from one species to another. In this type of reaction, one species undergoes oxidation (loses electrons) while another species undergoes reduction (gains electrons).

Looking at the provided options, the reaction that represents an oxidation-reduction process is:

2) 2 KCl → 2 K + Cl2

In this reaction, potassium (K) is being reduced (gaining electrons to form neutral K atoms) and chlorine (Cl) is being oxidized (losing electrons to form Cl2).