Which one of the reactions below is NOT a redox reaction?

Last updated: 7/9/2022

Which one of the reactions below is NOT a redox reaction? 2H2 +O2-> 2H2O CH4+2O2 --> CO2 + 2H20 2Al+3ZnC12->2AICI3 +3Zn AgNO3 + NaCl-> AgCl + NaNO3 C+ 2H2 --> CH4