Question

Which one of the following reactions is a redox reaction?

A) H2O + NaCl - NaOH + HCl
B) NaOH + HCl - NaCl + H2O
C) Pb2+ + 2Cl- - PbCl2
D) AgNO3 + HCl - HNO3 + AgCl
E) None of the above is a redox reaction.

Answer 1

Option D) AgNO3 + HCl - HNO3 + AgCl is a redox reaction as it involves both oxidation and reduction reactions.

Step-by-step explanation:

The redox reaction among the options listed is option D) AgNO3 + HCl - HNO3 + AgCl. In this reaction, silver nitrate (AgNO3) is oxidized, as the silver ion (Ag+) loses an electron to form silver metal (Ag). At the same time, hydrochloric acid (HCl) is reduced, as the chloride ion (Cl-) gains an electron to form silver chloride (AgCl). Therefore, this reaction involves both oxidation and reduction reactions, making it a redox reaction.