Which of the following statement is wrong?

Options

A. An acidified solution of `K_2Cr_2O_7` liberated iodine from iodides
B. In acidic solution dichromate ions are converted to chromate ions
C. Ammonium dichromate on heating undergo exothermic decomposition to give `Cr_2O_3`
D. Potassium dichromate is used as a titrant for Fe+ ions

Answer

b

Explanation

In acidic solution, chromate is converted to dichromate.
`2CrO_4^(2-)+2H^(o+)toCr_2O_7^(2-)+H_2O`