Ncert Exercises & Solutions

Which of the following is not an example of redox reaction?

1. $CuO + H_{2} \to Cu + H_{2} O$

2. ${Fe}_{2} O_{3} + 3 CO \to 2 Fe + 3 {CO}_{2}$

3. $2 K + F_{2} \to 2 KF$

4. ${BaCl}_{2} + H_{2} {SO}_{4} \to {BaSO}_{4} + 2 HCl$

Hint: Redox reaction = oxidation-reduction reaction

Following reactions are the example of redox reaction

CuO + H_{2} \to Cu + H_{2} O

{Fe}_{2} O_{3} + 3 CO \to 2 Fe + 3 {CO}_{2}

2 K + F_{2} \to 2 KF

Option (d) is not an example of redox reaction because it is an example of double displacement reaction.