The colour of K M n O 4 is due to: [where M → metal, L → ligand]

L → M charge transfer transition

M → L charge transfer transition

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The orange colour of $K_{2} {Cr}_{2} O_{7}$ and purple colour of ${KMnO}_{4}$ is due to

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Important Questions on Transition and Inner Transition Elements

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

The colour of

K M n O_{4}

is due to: [where

M \to

metal,

L \to

ligand]

EASY

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

In the following passage there are blanks, each of which has been numbered. There are questions given below the passage and for each question, four words are suggested, one of which fits the blank appropriately. Find out the appropriate word in each case.

Whenever I go into a bank, I feel scared. Everybody and everything that I see there (1) ____ me. As for the manager the sight (2) ____ him simply terrifies me and (3) ____ me want to runaway (4) _____ I can. As soon as I (5) ____ the door of the bank I lose my head (6) ____ when I try to do any (7) ____ there, I behave like an idiot. I cannot explain (8) ____ for this but that is how it (9) ____ has been that is how it is (10) ____.

Select the most appropriate option for blank No. 10.

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

A mixture of

NaCl

and

K_{2} {Cr}_{2} O_{7}

is heated with conc.

H_{2} {SO}_{4}

, deep red vapours and formed. Which of the following statement is false ?

EASY

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

Aqueous solution of a salt

(A)

forms a dense white precipitate with

{BaCl}_{2}

solution. The precipitate dissolves in dilute

HCl

to produce a gas

(B)

which decolourises acidified

{KMnO}_{4}

solution.

A

and

B

respectively are :

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

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

When dil. sulphuric acid reacts with aqueous solution of potassium chromate, the colour changes from yellow to orange. This shows that

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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

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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;

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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)

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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:

EASY

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

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

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

Name the gas that can readily decolourise acidified

{KMnO}_{4}

solution.

EASY

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

A solid

' X'

on reaction with

dil HCl

liberates a gas

' Y'

, which decolorises acidified

{KMnO}_{4}

X, Y

respectively are:

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

The incorrect statement is:

EASY

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

Which one of the following titrations of permanganate does not give satisfactory results?

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:-

EASY

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

In acidic medium potassium permanganate oxides oxalic acid to;

EASY

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

The ionic charges of manganate and permanganate ion are respectively

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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

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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:

The orange colour of K2Cr2O7 and purple colour of KMnO4 is due to

Important Questions on Transition and Inner Transition Elements

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The orange colour of $K_{2} {Cr}_{2} O_{7}$ and purple colour of ${KMnO}_{4}$ is due to