Chemistry - Complete d-block Question with Solution | TestHub

(A) ${\mathrm{MnO}}_2+4\mathrm{HCl}\to {\mathrm{MnCl}}_2+{\mathrm{Cl}}_2+2{\mathrm{H}}_2\mathrm{O}$

(B)    Decomposition of acidic KMnO₄ is catalysed by sunlight

(C) ${\mathrm{E}}_{{\mathrm{MnO}}_4^{2-}/{\mathrm{MnO}}_2}^{\mathrm{O}}=+2.26$ Volt

$3K_2{\mathrm{MnO}}_4+2{\mathrm{H}}_{2}O\to 2K{\mathrm{MnO}}_4+Mn{O}_2\downarrow +4K\mathrm{OH}$

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(D)   KMnO₄ also acts as on oxidizing agent in alkaline medium :

$${\mathrm{MnO}}_4^{-}+2{\mathrm{H}}_{2}O+3e^{-}\to {\mathrm{MnO}}_2+4O{H}^{-};E^0=+1.23Volt$$