Question 991
What is the oxidation state of chromium in chromite ore (FeCr2O4)?
Question 992
What is the oxidation state of manganese in Mn2O7?
Question 993
What is the oxidation state of chromium in potassium dichromate (K2Cr2O7)?
Question 994
Which ion is in equilibrium with the dichromate ion (Cr2O7 2–) in aqueous solution?
Question 995
What is the formula of the orange crystalline compound obtained after acidifying the sodium chromate solution?