3
QuizMultiple Choice
Oxidation-Reduction — Cumulative exam
Question 3 • 2026-2027_MDCPS_2003345_Chemistry_1_B-CR
Which of the following is an oxidation-reduction reaction?
Answer
A
SO2(g) + H2O(l) H2SO3(aq)
B
CaCO3(s) CaO(s) + CO2(g)
C
Ca(OH)2(s) + H2CO3(l) CaCO3(aq) + 2H2O(l)
D
C6H12O6(s) + 6O2(g) 6CO2(g) + 6H2O(l)