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

Distinguish between the following pair of compounds using a reagent as a chemical test: Magnesium chloride and magnesium nitrate solution.

Silver nitrate can be used to test chloride ion present in a compound thus magnesium chloride reacts with silver nitrate and forms a white precipitate of silver chloride and an aqueous solution of magnesium nitrate, but magnesium nitrate does not react with silver nitrate.

HARD

Earn 100

Which of the following chlorides do not produce chromyl chloride vapour when heated with conc. $H_{2} {S O}_{4}$ and $K_{2} {C r}_{2} O_{7}$ ?

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Important Questions on The d- and f-Block Elements

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

When treated with conc.

HCl, {MnO}_{2}

yields gas

(X)

which further reacts with

Ca {(OH)}_{2}

to generate a white solid

(Y)

reacts with dil.

HCl

to produce the same gas

X .

the solid

Y

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

Which of the following statements is/are false?

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

How many peroxy linkages are present in

C r O_{5}

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

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>The d- and f-Block Elements>Some Important Compounds of Transition Metals

A chloride salt solution acidified with dil.

{HNO}_{3}

gives a curdy white precipitate,

[A]

, on addition of

{AgNO}_{3}

. [A] on treatment with

{NH}_{4} OH

gives a clear solution, B.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

Name the gas that can readily decolourise acidified

{KMnO}_{4}

solution.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

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:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ______________.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the before mentioned solution, a white precipitate is obtained which does not dissolve in dilute nitric acid. The anion is:

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

The colour of

K M n O_{4}

is due to: [where

M \to

metal,

L \to

ligand]

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

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

M n

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

In the detection of II group acid radical, the salt containing chloride is treated with concentrated sulphuric acid, the colourless gas is liberated. The name of the gas is

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

Which of the following is not formed when H₂S reacts with acidic K₂Cr₂O₇ solution ?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

Consider the following reactions:

NaCl + K_{2} {Cr}_{2} O_{7} + \underset{(Conc.)}{H_{2} {SO}_{4}} \to (A) +

side products

(A) + N a O H \to (B) +

side products

(B) + \underset{(dilute)}{H_{2} S O_{4}} + H_{2} O_{2} \to (C) +

side products
The sum of the total number of atoms in one molecule each of

(A), (B)

and

(C)

is ________

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

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>The d- and f-Block Elements>Some Important Compounds of Transition Metals

The manganate and permanganate ions are tetrahedral, due to:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

The number of water molecules not coordinated to copper ion directly in

C u S O_{4} \cdot 5 H_{2} O,

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

Which one of the following statements is correct when

S O_{2}

is passed through acidified

K_{2} C r_{2} O_{7}

solution?

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

Distinguish between the following pair of compounds using a reagent as a chemical test:

Magnesium chloride and magnesium nitrate solution.

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Some Important Compounds of Transition Metals

When a mixture of

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

and concentrated

H_{2} {SO}_{4}

is heated in a dry test tube, a red vapour

(X)

is evolved. This vapour

(X)

turns an aqueous solution of

NaOH

yellow due to the formation of

Y . X

and

Y,

respectively, are:

Which of the following chlorides do not produce chromyl chloride vapour when heated with conc. H2SO4 and K2Cr2O7 ?

Important Questions on The d- and f-Block Elements

Learn and Prepare for any exam you want !

Which of the following chlorides do not produce chromyl chloride vapour when heated with conc. $H_{2} {S O}_{4}$ and $K_{2} {C r}_{2} O_{7}$ ?