At pH =4. Cr_(2)O_(7)^(2-) existas – InterviewSolution

1.	At pH =4. Cr_(2)O_(7)^(2-) existas
Answer» `CrO_(2)^(2+)` `CrO_(4)^(2-)` `CrO_(4)^(2+)` `Cr_(2)O_(7)^(2-)` Answer :D

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