Which of the following reactions is not correct?

M n O_{4}^{-} + 8 H^{+} + 5 F e^{2 +} \to 5 F e^{3 +} + M n^{2 +} + 4 H_{2} O

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2 M n O_{2} + 4 K O H + O_{2} \to 4 K M n O_{4} + 2 H_{2} O

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2 N a_{2} C r O_{4} + 2 H^{+} \to N a_{2} C r_{2} O_{7} + 2 N a^{+} + H_{2} O

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K_{2} C r_{2} O_{7} + 7 H_{2} S O_{4} + 6 K I \to 4 K_{2} S O_{4} + C r_{2} (S O_{4})_{3} + 3 I_{2} + 7 H_{2} O

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Solution

The correct option is B $2 M n O_{2} + 4 K O H + O_{2} \to 4 K M n O_{4} + 2 H_{2} O$
${2 M n O}_{2} + 4 K O H + O_{2} ⟶ 4 {K M n O}_{4} + 2 H_{2} O$
wrong (X)
${2 M n O}_{2} + 4 K O H + O_{2} ⟶ {2 K}_{2} {M n O}_{4} + 2 H_{2} O$

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Similar questions

Q. In the following redox reaction:

5 {F e}^{2 +} + M n O_{4}^{-} + 8 H^{+} ⇌ {M n}^{2 +} + 5 {F e}^{3 +} + 4 H_{2} O

Given:

{F e}^{3 +} + e^{-} ⟶ {F e}^{2 +}, {E_{1}}^{o}

M n O_{4}^{-} + 8 H^{+} + 5 e^{-} ⟶ {M n}^{2 +} + 4 H_{2} O, {E_{2}}^{o}

Potential at the equivalence point is :

Q. The equivalent weight of

K_{2} C r_{2} O_{7}

(molecular weight = 294 u) in the following reaction is:

K_{2} C r_{2} O_{7} + 6 K I + 7 H_{2} S O_{4} \to C r_{2} (S O_{4})_{3} + 3 I_{2} + 4 K_{2} S O_{4} + 7 H_{2} O

K M n O_{4}

reacts with ferrous sulphate according to the following equation:

M n O_{4}^{-} + 5 F e^{2 +} + 8 H^{+} \to M n^{2 +} + 5 F e^{3 +} + 4 H_{2} O

here,

10 m L

0.1 M K M n O_{4}

is equivalent to

[C P M T 1999]

$K M n O_{4}$ reacts with ferrous ammonium sulphate according to the equation $M n O_{4}^{-} + 5 F e^{2 +} + 8 H^{+} \to M n^{2 +} + 5 F e^{3 +} + 4 H_{2} O$ , here 10 ml of 0.1 M $K M n O_{4}$ is equivalent to

M n O_{4}^{-} + 5 {F e}^{2 +} + 8 H^{+} \to {M n}^{2 +} + 5 {F e}^{3 +} + 4 H_{2} O (l)

In the equation for the reaction represented above, which of the following indicates the reduction that takes place?

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Which of the following reactions is not correct?

The correct option is B 2MnO2+4KOH+O2→4KMnO4+2H2O2MnO2+4KOH+O2⟶4KMnO4+2H2O wrong (X)2MnO2+4KOH+O2⟶2K2MnO4+2H2O

The correct option is B $2 M n O_{2} + 4 K O H + O_{2} \to 4 K M n O_{4} + 2 H_{2} O$
${2 M n O}_{2} + 4 K O H + O_{2} ⟶ 4 {K M n O}_{4} + 2 H_{2} O$
wrong (X)
${2 M n O}_{2} + 4 K O H + O_{2} ⟶ {2 K}_{2} {M n O}_{4} + 2 H_{2} O$