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Potassium Permanganate

An aqueous so...

Question

An aqueous solution of an unknown compound (X) gives the following reactions
(i) It gives a brown precipitate with alkaline $K M n O_{4}$ solution.
(ii) It forms $H C l$ and evolves $O_{2}$ when reacted with $C l_{2}$ gas.
(iii) It liberates $I_{2}$ from an acidified KI solution
(iv) It gives orange yellow color with acidified titanic sulfate solution. Identify $X$ .

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Solution

The unknown compound $X$ is hydrogen peroxide
(1) $2 {K M n O}_{4} + 3 H_{2} O_{2} ⟶ 2 {M n O}_{2} + 3 O_{2} + 2 H_{2} O + 2 K O$
(2) ${C l}_{2} + H_{2} O_{2} ⟶ 2 H C l + O_{2}$
(3) $2 K I + H_{2} O_{2} ⟶ 2 K O H + I_{2}$
(4) $T i {({S O}_{4})}_{2} + H_{2} O_{2} H_{2} {S O}_{4} - ---- \to H_{2} [{T i O}_{2} {({S O}_{4})}_{2}]$
per-titanic acid

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Similar questions

Q. An aqueous solution of an unknown compound

(X)

gives the following reactions.
(i) It gives brown precipitate with alkaline

K M n O_{4}

solution.
(ii) It forms

H C l

O_{2}

when reacted with

C l_{2}

gas.
(iii) It liberates

l_{2}

from an acidified

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solution.
(iv) It gives orange yellow colour with acidified titanic sulfate solution.
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Q. An aqueous solution of a compound

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(i) It decolourises an acidified

K M n O_{4}

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(ii) It liberates iodine from an acidified potassium iodine solution.
(iii) It gives a brown precipitate with alkaline

K M n O_{4}

solution with the evolution of oxygen.
(iv) It removes black stains from old oil paintings.
Identify

X

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Q. An unknown inorganic compound

(X)

loses its water of crystallisation. On heating its aqueous solution gives the following reacion:
(i) it gives a white turbidity with dilute

H C l

solution.
(ii) it decolourises a solution of iodine in

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(iii) it gives a white precipitate with

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An aqueous solution of an inorganic compound (X) gives the following reactions.

(i) With an aqueous solution of

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K I

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(iii) With an aqueous solution of potassium ferrocyanide a chocolate colored ppt. is obtained.

A light bluish-green crystalline compound responds to the following tests:

(i). Its aqueous solution gives a brown precipitate on reaction with alkaline K

_{2}

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