Which of the following is a redox reaction?
A. 2Na +Cl2 -> 2NaCL
B. Ba^2 + SO4^-2 -> BaSO4
C. K2Cr2O7 + 2KOH ->2K2CrO4 + H20
D. Na2CO3 + 2HCL -> 2NaCl +CO2+ H2O
E. H2O -> H^+ +OH^-
Answer: A
Which of the following is a redox reaction?
A. 2Na +Cl2 -> 2NaCL
B. Ba^2 + SO4^-2 -> BaSO4
C. K2Cr2O7 + 2KOH ->2K2CrO4 + H20
D. Na2CO3 + 2HCL -> 2NaCl +CO2+ H2O
E. H2O -> H^+ +OH^-
Answer: A