JEE Advanced 2007 Chemistry question

Consider a 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

(A)3
(B)4
(C)5
(D)6Correct

Answer: (D)

Solution

Mohr's salt supplies . Dichromate is reduced from Cr(+6) to Cr(+3): , taking 6 electrons per mole, while each

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Question ID VK-037492