1.

Which one of the following reactions does not involve either oxidation or reduction?

A. \[V{{O}^{+}}_{2}\to {{V}_{2}}{{O}_{3}}\]
B. \[Na\to N{{a}^{+}}\]
C. \[Cr{{O}^{2-}}_{4}\]\[\to C{{r}_{2}}{{O}_{7}}^{2-}\]
D.  \[Z{{n}^{2+}}\to Zn\]
Answer» D.  \[Z{{n}^{2+}}\to Zn\]


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