In basic medium CrO 4 2 - oxidises S 2 O 3 2 - to form SO 4 2 - and itself changes into Cr OH 4 - .The…

In basic medium CrO42- oxidises S2O32- to form SO42- and itself changes into CrOH4-.The volume of 0.154MCrO42- required to react with 40 mL of 0.25MS2O32- is _____ mL. (Rounded-off to the nearest integer)

Solution

CrO42-+S2O32-→SO42-+CrOH4+3

gm equi. of CrO42-=S2O32-

0.154×3×v=0.25×40×8

v=173.16=173ml

Hence answer is 173

Asked in: JEE Main 2021 (25 Feb Shift 1)

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