Which of the following statements is wrong?

Options

A. An acidified solution of `K_2 Cr_2 O_7` liberates iodine from iodides
B. In acidic solution dichromate ions are converted to chromate ions
C. Ammonium dichromate on heating undergo exothermic deomposition to give `Cr_2 O_3`
D. Potassium dichromate is used as a titrant for `Fe^(2+)` ions

Answer

B

Explanation

In acidic solution, chromate is converted to dichromate:`2CrO_(4)^(2-) +2H^(o+) to Cr_2 O_(7)^(2-) +H_2 O`