Which of the following reactions is not an example of an oxidation-reduction reaction?

3Br2 + 2Ga yields 2GaBr3

H2S + Cl2 yields 2HCl + S

2PbS + 3O2 yields 2PbO + 2SO2

K2Cr2O7 + KOH yields 2 K2CrO4 + H2O

Question

Which of the following reactions is not an example of an oxidation-reduction reaction?

 3Br2 + 2Ga yields 2GaBr3

 H2S + Cl2 yields 2HCl + S

 2PbS + 3O2 yields 2PbO + 2SO2

 K2Cr2O7 + KOH yields 2 K2CrO4 + H2O

anonymous · Answer

I got C, is that correct?

anonymous · Answer

@aaronq can check my answer pls?

aaronq · Answer

It's not C. 

I'ts D

K2$\underbrace{Cr_2}_{+6}$O7 + KOH -> 2 K2$\underbrace{Cr}_{+6}$O4 + H2O

Note that there are 2 Cr's

anonymous · Answer

OH, okay thank you for clearing that up for me.