MereTeacher

JEE • NEET • FOUNDATION

JEE · NEET Previous Year Question

$What is the change in the oxidation state of Mn in the reaction of MnO_{4}^{--} with H_{2} O_{2} in acidic medium?$

Topic: JEE PYQ

Answer: C. Full step-by-step solution below.

A $7 \to 4$
B $6 \to 4$
C $7 \to 2$
D $6 \to 2$

Correct answer: C

Solution

(c) 2 MnO_{4}^{-} + 6 H^{+} + 5 H_{2} O_{2} ⟶ 2 Mn^{2 +} + 8 H_{2} O + 5 O_{2}

More Hydrogen PYQs

$Deionized water is obtained by passing hard water through$
$Given below are two statements : Statement I: H_{2} O_{2} is used in the synthesis of Cephalosporin Statement II : H_{2} O_{2} i\dots$
$The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are:$
$Which one of the following statements is incorrect ?$
$The hardness of a water sample containing 10^{- 3} M MgS O_{4} expressed as CaC O_{3} equivalents(in\dots$