When H2O2 is added to an acidified solution of K2Cr2O7 | CHEMISTRY - SOME IMPORTANT COMPOUNDS OF TRANSITION ELEMENTS | SolveeIt | Solveeit

Today, August 24

Question

When H2O2 is added to an acidified solution of K2Cr2O7

A

Solution turns green due to formation of Cr2O3

B

Solution turns yellow due to formation of K2CrO4

C

A blue coloured compound CrO(O2)2 is formed

D

Solution gives green ppt of Cr(OH)3

Answer

A blue coloured compound CrO(O2)2 is formed

Explanation

Solution

Cr2O72– + 2H+ + 4H2O2 $\longrightarrow$ 2CrO(O2)2 (blue coloured) + 5H2O.