2 MnO 4 - + bI - + cH 2 O rightarrow xI 2 + yMnO 2 + zOH - If the above equation is balanced with integer coefficients, the value of z is

Chemistry · Redox Reactions

JEE Main 2024 — 30 January, Shift 1 — Question 76

$2 \mathrm{MnO}_{4}^{-}+\mathrm{bI}^{-}+\mathrm{cH}_{2} \mathrm{O} \rightarrow \mathrm{xI}_{2}+\mathrm{yMnO}_{2}+\mathrm{zOH}^{-}$

If the above equation is balanced with integer coefficients, the value of $z$ is $\qquad$

Numerical answer — enter this value.

Adding oxidation half and reduction half, net reaction is

$2 \mathrm{MnO}_{4}^{-}+6 \mathrm{I}^{-}+4 \mathrm{H}_{2} \mathrm{O} \rightarrow 3 \mathrm{I}_{2}+2 \mathrm{MnO}_{2}+8 \mathrm{OH}^{-}$

$\Rightarrow \mathrm{z}=8$

$\Rightarrow$ Ans 8

Answer key and solution verified before publishing.

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