Question

In basic medium, H2O2 acts as an oxidising agent in its reactions with :

• A. Cr2(SO4)3
• B. Ag2O
• C. K3[Fe(CN)6]
• D. K2Cr2O7

Answer 1

Answer: (A)

Cr2(SO4)3

Answer 2

In basic medium H2O2 oxidises Cr2(SO4)3

2Cr3+ + 10H– + 3H2O2 $\longrightarrow$2CrO2–4 + 8H2O

Cr – Oxi. No. = + 3       Cr – Oxi. No. = + 6