Match the catalysts to the correct process. Catalyst Process A. T i C l 3 i. Wacker process B. P d C l 2 ii. Ziegler – Natta polymerisation C. C u C l 2 iii. Contact process` D. V 2 O 5 iv. Deacon’s process

A → i i , B → i , C → i v , D → i i i

A → i i i , B → i , C → i i , D → i v

A → i i i , B → i i , C → i v , D → i

A → i i , B → i i i , C → i v , D → i

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Transition metals and many of their compounds show paramagnetic behaviour where there are unpaired electron or electrons. The magnetic moment arises from the spin and orbital motions in ions or molecule. Magnetic moment of $n$ unpaired electrons is given as

$μ = \sqrt{n (n + 2)}$ Bohr Magneton

Magnetic moment increases as the number of unpaired electrons increases.
Magnetic moment of ${[Ni ({CN}_{4})]}^{2 -}$ is zero but that of ${[Ni {(H_{2} O)}_{4}]}^{2 +}$ is $2.83 BM .$ It is because of:

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Important Questions on The d- and f-Block Elements

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Find the metallic and ferromagnetic substance.

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The colour and magnetic nature of manganate ion

({MnO}_{4}^{2 -})

is-

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

A compound of vanadium chloride has spin only magnetic moment of

1.73

BM. Its formula is

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The statement that is INCORRECT about the interstitial compounds is:

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Which of the following arrangements does not represent the correct order of the property stated against it?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Which one of the following species is stable in aqueous solution?

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Maximum number of covalent bonds formed by

N

and

P

are -

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Magnetic moment

2.83

BM is given by which of the following ions?
(At.nos.

T i = 22, C r = 24, M n = 25, N i = 28)

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The equation which is balanced and represents the correct product(s) is

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

When heated in air, brown copper powder turns black. This black powder would turn brown again when heated with

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The metal that gives hydrogen gas upon treatment with both the acid as well as the base is

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The pair of metal ions that can give a spin only magnetic moment of

3.9 B M

for the complex

[M {(H_{2} O)}_{6}] C l_{2}

, is:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Consider the hydrated ions of

T i^{2 +}, V^{2 +}, T i^{3 +}

and

S c^{3 +}

. The correct order of their spin-only magnetic moments is:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Which of the following are the transition metal ions responsible for colour in ruby and emerald respectively?

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The correct order of the first ionization enthalpies is:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

For the following Assertion and Reason, the correct option is:
Assertion: For hydrogenation reactions, the catalytic activity increases from Group

5

to Group

11

metals with maximum activity shown by Group

7 - 9

elements.
Reason: The reactants are most strongly adsorbed on group

7 - 9

elements.

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Reason of lanthanoid contraction is:

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Spin only magnetic moment

2 .84 BM

is given by:

(Atomic Number of

Ni =28, Ti =22, Cr =24, Co =27

)

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

The transition elements that has the lowest enthalpy of atomisation is:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>General Properties of d-Block Elements

Match the catalysts to the correct process.

	Catalyst		Process
A.	$T i C l_{3}$	i.	Wacker process
B.	$P d C l_{2}$	ii.	Ziegler – Natta polymerisation
C.	$C u C l_{2}$	iii.	Contact process`
D.	$V_{2} O_{5}$	iv.	Deacon’s process

Important Questions on The d- and f-Block Elements

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