Some Important Compounds of Transition Elements — Prelims Questions

Which of the following statements is INCORRECT regarding the properties of $KMnO_4$?

When a yellow solution of sodium chromate is acidified with dilute sulfuric acid, what color change is observed?

What is the equivalent weight of $K_2Cr_2O_7$ when it acts as an oxidizing agent in acidic medium? (Molar mass of $K_2Cr_2O_7 = 294,g/mol$)

Which of the following is NOT a correct statement about the preparation of $KMnO_4$?

Which of the following statements is true regarding the structure of dichromate ion ($Cr_2O_7^{2-}$)?

A solution containing $Fe^{2+}$ ions is titrated with $KMnO_4$ in acidic medium. If $25,mL$ of $0.1,M,KMnO_4$ solution is required to completely oxidize $50,mL$ of the $Fe^{2+}$ solution, what is the concentration of the $Fe^{2+}$ solution?

Which of the following is an application of potassium dichromate ($K_2Cr_2O_7$)?