Yellow colour of chromate changes to orange on acidification due to which of the following?

Cr3+ Cr2O3 Cr2O72- CrO4-

Cr2O72-

The yellow colored solution of chromate salt changes to orange color on acidification due to the formation of Cr2​O7​2−. In acidic medium, chromate ion changes to dichromate ion. yellow 2CrO4​2−​+2H+→ orange red Cr2​O7​2−​+H2​O