Chemistryhard · Past Paper
Which of the following is a disproportionation reaction?
A$2H_2O_2 \rightarrow 2H_2O + O_2$
B$Zn + H_2SO_4 \rightarrow ZnSO_4 + H_2$
C$CaO + H_2O \rightarrow Ca(OH)_2$
D$2Na + Cl_2 \rightarrow 2NaCl$
✓ Correct Answer: A — $2H_2O_2 \rightarrow 2H_2O + O_2$
In $H_2O_2$, Oxygen has an oxidation state of -1. It is both oxidized to O2 (0) and reduced to H2O (-2).
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