Whicwhich of the following is an oxidation-reduction reaction?
so2(g) + h2o(l) mc010-1.jpg h2so3(aq)
caco3(s) mc010-2.jpg cao(s) + co2(g)
ca(oh)2(s) + h2co3(l) mc010-3.jpg caco3(aq) + 2h2o(l)
c6h12o6(s) + 6o2(g) mc010-4.jpg 6co2(g) + 6h2o(l)h of the following is an oxidation-reduction reaction?

Answer is: C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(l).

Balanced chemical reaction for cellular respiration (convert biochemical energy):  

C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l).

In this reaction carbon is oxidized (lost electrons) and oxygen is reduced from oxidation number 0 to oxidation number -2 (gain electrons).

In other example atoms do not change their oxidation numbers.

Glucose (C₆H₁₂O₆) is a chemical compound composed of six carbon atoms, twelve hydrogen atoms and six oxygen atoms.

12 is it do you think so