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Nucleophilic Substitution Reaction

Hydrogen pero...

Question

Hydrogen peroxide solution ( $20$ mL) reacts quantitatively with a solution of $K M n O_{4}$ ( $20$ mL) acidified with dilute $H_{2} S O_{4}$ . The same volume of the $K M n O_{4}$ solution is just decolourised by $10$ mL of $M n S O_{4}$ in neutral medium simultaneously forming a dark brown precipitate of hydrated $M n O_{2}$ . The brown precipitate is dissolved in $10$ mL of $0.2 M$ sodium oxalate under boiling condition in the presence of dilute $H_{2} S O_{4}$ .

Choose the correct balanced equation involved in the reaction.

\begin{matrix} 2 K M n O_{4} & + & 3 M n S O_{4} & + & 2 H_{2} O & ⟶ & 5 M n O_{2} & + & K_{2} S O_{4} & + & 2 H_{2} S O_{4} (p p t) \end{matrix}

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\begin{matrix} 2 K M n O_{4} & + M n S O_{4} & + & 2 H_{2} O & ⟶ & M n O_{2} & + & K_{2} S O_{4} & + & 2 H_{2} S O_{4} (p p t) \end{matrix}

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\begin{matrix} 2 K M n O_{4} & + & 3 M n S O_{4} & + & 2 H_{2} O & ⟶ & M n O_{2} & + & K_{2} S O_{4} & + & 4 H_{2} S O_{4} (p p t) \end{matrix}

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\begin{matrix} K M n O_{4} & + & 3 M n S O_{4} & + & 2 H_{2} O & ⟶ & 5 M n O_{2} & + & K_{2} S O_{4} & + & 4 H_{2} S O_{4} (p p t) \end{matrix}

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Solution

The correct option is A $\begin{matrix} 2 K M n O_{4} & + & 3 M n S O_{4} & + & 2 H_{2} O & ⟶ & 5 M n O_{2} & + & K_{2} S O_{4} & + & 2 H_{2} S O_{4} (p p t) \end{matrix}$
Applying $M_{1} V_{1} = M_{2} V_{2}$ , we get that 2 mol of $K M n O_{4}$ are required.

$\begin{matrix} 2 K M n O_{4} & + & 3 M n O_{4} & + & 2 H_{2} O & ⟶ & 5 M n O_{2} & + & K_{2} S O_{4} & + & 2 H_{2} S O_{4} (p p t) \end{matrix}$

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Similar questions

Q. A

20 mL

solution of hydrogen peroxide reacts quantitatively with a

20 mL

solution of

K M n O_{4}

acidified with dilute

H_{2} S O_{4}

. The same volume of the

K M n O_{4}

solution is decolourised by

10 mL

M n S O_{4}

in neutral medium simultaneously forming a dark brown precipitated of hydrated

M n O_{2}

. The brown precipitate is dissolved in

20 mL

0.2 M

sodium oxalate under boiling condition in the presence of dilute

H_{2} S O_{4}

. Calculate the volume strength of

H_{2} O_{2}

Q. Hydrogen peroxide solution (20 mL) reacts quantitatively with a solution of

K M n O_{4}

(20 mL) acidified with dilute

H_{2} S O_{4}

, The same volume of the

K M n O_{4}

solution is just decolorized by 10mL of

M n S O_{4}

in neutral medium simultaneously forming a dark brown precipitate of hydrated

M n O_{2}

The brown pecipitate is dissolved in 10 mL of 0.2 M sodium oxalate under boiling condition in the presence of dilute

H_{2} S O_{4}

, Write the balanced equations involved in the reactions and calculate the molarity of

H_{2} O_{2}

Q. Hydrogen peroxide solution having volume of

20

mL reacts quantitatively with a solution of

K M n O_{4}

of volume

20

mL acidified with dilute

H_{2} S O_{4}

. The same volume of the

K M n O_{4}

solution is just decolourised by

10

mL of

M n S O_{4}

in a neutral medium simultaneously forming a dark-brown precipitate of hydrated

M n O_{2}

. The brown precipitate is dissolved in

10

mL of

0.2 M

sodium oxalate under boiling condition in the presence of dilute

H_{2} S O_{4}

. If the molarity of

H_{2} O_{2}

x

, then find the value of

10 x

Q. Hydrogen peroxide solution

(20 m L)

reacts quantitatively with a solution of

K M n O_{4} (20 m L)

acidified with dilute

H_{2} S O_{4}

. The same volume of the

K M n O_{4}

solution is just decolourised by

10 m L

M n S O_{4}

in neutral medium simultaneously forming a dark brown precipitate of hydrated

M n O_{2}

. The brown precipitate is dissolved in

10 m L

0.2 M

sodium oxalate under boiling condition in the presence of dilute

H_{2} S O_{4}

. Write the balanced equations involved in the reactions and calculate the molarity of

H_{2} O_{2}

Q. What volume of

O_{2} (g)

measured at 1atm and 273 K will be formed by action of 100 mL of 0.5 N

K M n O_{4}

on hydrogen peroxide in an acid solution ? The skeleton equation for the reaction is
(

K M n O_{4} + H_{2} S O_{4} + H_{2} O_{2} \to K_{2} S O_{4} + M n S O_{4} + O_{2} + H_{2})

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The correct option is A 2KMnO4+3MnSO4+2H2O⟶5MnO2+K2SO4+2H2SO4(ppt)Applying M1V1=M2V2 , we get that 2 mol of KMnO4 are required. 2KMnO4+3MnO4+2H2O⟶5MnO2+K2SO4+2H2SO4(ppt)