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

EASY

Earn 100

On the basis of the figure given below, answer the following question:

In the third transition series, identify and name the metal with the highest melting point.

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

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

HARD

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

The compound with empirical formula

{CoCl}_{3} . 6 {NH}_{3}

showed conductivity corresponding to three ions. The complex is

EASY

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

Assertion: In general, transition metals have high melting points.

Reason: More number of electrons from ' $(n - 1) d$ ' and ' $ns$ ' are involved in interatomic metallic bonding.

The correct option among the following 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

Give reasons for the enthalpy of atomisation of transition metals is high.

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

Which of the following set of transition metals have high volatility?

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

EASY

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

Why do transition metals have high enthalpies of atomization?

MEDIUM

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

Discuss the changes in following properties of the first transition series: Metallic character

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

Give reasons:
Iron has higher enthalpy of atomization than that of copper.

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

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:

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 -

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

Find the metallic and ferromagnetic substance.

EASY

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

The metal which has the lowest melting point among the following is

MEDIUM

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

Give reason and select one atom/ion which will exhibit asked property :

Cr

or

Cu

(High melting and boiling point)

EASY

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

Mercury is the only metal which is liquid at

0^{\circ} C

. This is due to