Which of the following is not a redox reaction?
A. 2 2 Mg O MgO + →2
B. SO H SO H S O 3 2 4 22 7 + →
C. CuS O C Cu SO CO + +→ + + 2 2 22
D. 42 2 2 Ag H S O Ag S H O
1 answer
The correct answer is D. 42 2 2 Ag H S O Ag S H O. This is not a redox reaction because it does not involve any change in oxidation states.