क्रिस्टियानो रोनाल्डो का म्यूजियम CR7 Museu #facts #shorts

What is the change in oxidation state of Cr" in " K_(2)Cr_(2)O_(7) when it acts as an oxidising agent.

The structure of Cr_2O_7^(2-)

A: Cr_(2)O_(7)^(-2) , 2 is orange in colour R: It is due to the presence of unpaired electrons in d-subshell of Cr.