Consider the titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is :

Options

A. 3
B. 4
C. 5
D. 6

Answer

D

Explanation

`Cr_(2)O_(7)^(2-)+6Fe^(2+) +14H^(+) to 2Cr^(3+) +6Fe^(3+)+7H_(2)O`
1 mole of dichromate oxidises six moles of ferrous ion present in Moh's salt