Question

Which reaction does not involve either in oxidation or reduction ?

• A. VO²⁺→ V₂O₃
• B. Na → Na⁺
• C. $CrO_{4}^{2 -}$→$Cr_{2}O_{7}^{2 -}$
• D. Zn²⁺→ Zn

Answer 1

Answer: (C)

$CrO_{4}^{2 -}$→$Cr_{2}O_{7}^{2 -}$

Answer 2

2Cr⁶⁺ →$Cr_{2}^{6 +}$; Neither oxidation nor reduction