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How many electrons are gained by ${MnO}_{4}^{-}$ in strongly alkaline medium.

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Important Questions on Transition and Inner Transition Elements

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Treatment of alkaline

{KMnO}_{4}

solution with

KI

solution oxidizes iodide to:-

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

The incorrect statement is:

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

In tetrahedral permanganate ion

π

bonding type between metal and oxygen is;

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

How many electrons are involved during the oxidation reaction of

{KMnO}_{4}

in acidic medium ?

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Fusion of

M n O_{2}

with

K O H

in presence of

O_{2}

produces a salt

W .

Alkaline solution of

W

upon electrolytic oxidation yields another salt

X .

The manganese containing ions present in

W

and

X,

respectively, are

Y

and

Z .

Correct statement(s) is (are)

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

{KMnO}_{4}

acts as an oxidizing agent in alkaline medium. When alkaline

{KMnO}_{4}

is treated with

KI,

then

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

{MnO}_{2} + KOH \overset{Air}{\to} ?

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

A purple colored compound of Manganese

(X)

decomposes on heating to liberate oxygen and forms compounds of Manganese (

Y

and

Z

) compound

Z

reacts with

KOH

in presence of potassium nitrate to give compound

Y

. Compounds

X, Y

and

Z

respectively are

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

The manganate and permanganate ions are tetrahedral, due to:

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Thermal decomposition of a Mn compound

(X)

513 K

results in compound

Y,

M n O_{2}

and a gaseous product.

M n O_{2}

reacts with

N a C l

and concentrated

H_{2} S O_{4}

to give a pungent gas

Z

X, Y

and

Z,

respectively, are:

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Which of the following statements is correct about tetrahedral manganate and permanganate ions?

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Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

M n O_{2}

when fused with

K O H

and oxidized in air gives a dark green compound

X .

In acidic solution,

X

undergoes disproportionation to give an intense purple compound

Y

and

M n O_{2} .

The compounds

X

and

Y,

respectively, are

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Which among the following species acts as a self-indicator?

HARD

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

Given below are two statements:
Statement I: Potassium permanganate on heating at $573 K$ forms potassium manganate.

Statement II: Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature.

In the light of the above statements, choose the most appropriate answer from the options given below:

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

In the following reactions (i)

{MnO}_{2} + 4 HCl \to

and (ii)

2 {KMnO}_{4} + 16 HCl \to

, the number of moles of chlorine gas released respectively are

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

When

{MnO}_{2}

is fused with

KOH

in the presence of

{KNO}_{3}

as an oxidizing agent, it gives a dark green compound (A). Compound (A) disproportionates in an acidic solution to give a purple compound (B). An alkaline solution of compound (B) oxidises

KI

to compound (C) whereas an acidified solution of compound (B) oxidises

KI

to (D). Identify (A), (B), (C) and (D).

HARD

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

When oxalic acid is oxidised with acidified

{KMnO}_{4},

the number of moles of

{CO}_{2}

liberated is (consider balancing the reaction)

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

When a mixture of manganese dioxide, potassium hydroxide and potassium chlorate is fused, the product obtained is

EASY

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

In alkaline medium, the reaction of hydrogen peroxide with potassium permanganate produces a compound in which the oxidation state of

M n

MEDIUM

Chemistry>Inorganic Chemistry>Transition and Inner Transition Elements>Potassium Dichromate and Potassium Permanganate

When

X O_{2}

is fused with an alkali metal hydroxide in presence of an oxidizing agent such as

{KNO}_{3}

; a dark green product is formed which disproportionate in acidic solution to afford a dark purple solution.

X

is:

How many electrons are gained by MnO4- in strongly alkaline medium.

Important Questions on Transition and Inner Transition Elements

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How many electrons are gained by ${MnO}_{4}^{-}$ in strongly alkaline medium.