200 cc of x × 10 - 3 M potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr’s salt solution in acidic medium. Here x = ______. [2026]

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Solution

Q.
200 cc of $x \times 10^{- 3}$ M potassium dichromate is required to oxidise 750 cc of 0.6 M Mohr’s salt solution in acidic medium.

Here x = ______. [2026]

Ans.
(375)

$Number of equivalents of {Cr}_{2} O_{7}^{2 -} = Number of equivalents of Mohr's salt$

$200 \times x \times 10^{- 3} \times 6 = 750 \times 0.6 \times 1$

$x = 375$

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