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Standard XII

Chemistry

Interhalogen Compounds - Chemical Properties

Mn2+ is ident...

Question

$M n^{2 +}$ is identified by its oxidation to a salt giving pink colour in solution.

Which of the following is correct?
(a) The pink colour is due to the formation of $M n O_{4}^{-}$ .
(b) Oxidising agent used is $B r_{2}$ water or $P b O_{2} / H^{+}$ .
(c) Oxidised $M n^{2 +}$ changes to $K_{2} M n O_{4}$ (green) by KOH

All are correct

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Only (a) and (b) are correct

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Only (b) and (c) are correct

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Only (c) is correct

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Solution

The correct option is A All are correct
(a) Mn(II) is oxidized to pink coloured permanganate ion $(M n O_{4}^{-}$ .
(b) Bromine water or acidified lead oxide $(P b O_{2} / H^{+})$ can be used as oxidizing agents.
(c) Pink coloured permangante ion reacts with $K O H$ to form green coloured manganate ion $(M n O_{4}^{2 -})$ .
Option A is correct.

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Similar questions

Q. Some of alkali metal salts are coloured

N a_{2} C r O_{4} -

yellow,

K M n O_{4} -

pink,

K_{2} M n O_{4}

-green. It is due to:

Q. Compound

A

undergoes following reactions to form

B

and

C

(C)

gets decolorised by

F e^{3 +}

. Identify

A, B

and

C

respectively.

Black coloured solid

(A) K N O_{3} + K O H - ---------------- \to G r e e n c o l o u r e d s o l u t i o n (B)

Green Coloured Solution

(B)

C O_{2} - - \to

Pink solution

(C) + (A)

M n O_{4}^{-}

is of intense pink colour, though

M n

is in (+7) oxidation state. It is due to__________.

Q. A scarlet compound (A) is treated with conc.

{H N O}_{3}

to give a choclate brown precipitate (B). The precipitate is filtered and the filtrate is neutralised with

N a O H

. Addition to KI to the resulting solution gives a yellow precipitate (C). The precipitate (B) on warming with conc.

{H N O}_{3}

in the presence of

{M n ({N O}_{3})}_{2}

produces a pink-coloured solution due to the formation of (D). Compounds (A), (B), (C) and (D) are identified as

P b_{3} O_{4}

P b O_{2}

P B l_{2}

and

H M n O_{4}

(pink)

If the given statement is true enter 1 else enter 0.

Q. Identify (E) and (F) in the following:

FeSO

_{4}

(A)

Δ \to

(B) + (C) + (D)

_{2}

_{7}^{2 -}

^{+}

solution green. (B) dissolves in HCl forming deep yellow solution (E). (E) gives blue colour (F) with K

_{4} [F e (C N)_{6}]

. (D) dissolves in H

_{2}

O forming a well knows mineral acid called "king of acids".

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Mn2+ is identified by its oxidation to a salt giving pink colour in solution.Which of the following is correct?(a) The pink colour is due to the formation of MnO−4.(b) Oxidising agent used is Br2 water or PbO2/H+.(c) Oxidised Mn2+ changes to K2MnO4 (green) by KOH