EASY

Earn 100

Arrange $Y b^{+ 3}$ , $C e^{+ 3}, L a^{+ 3}, P m^{+ 3}$ ions in increasing order of their ionic radii

50% studentsanswered this correctly

Important Questions on d- and f-Block elements

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

The effect of lanthanoid contraction in the lanthanoid series of elements by and large means

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Which of the following properties is NOT of lanthanoids?

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Which of the following elements involves gradual filling of

4 f

- levels?

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Which one of the following lanthanides exhibits

+ 2

oxidation state with diamagnetic nature ? (Given

Z

for

Nd = 60, Yb = 70, La = 57, Ce = 58)

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Which of the following lanthanide ions has the highest number of unpaired electrons?

HARD

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

The incorrect statement among the following is:

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Which statement is incorrect with reference to inner transition elements?

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

What are lanthanoids? Give their general electronic configurations. What is lanthanoid contraction?

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Which of the following elements has the largest atomic radius?

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Among

Ce (4 f^{1} 5 d^{1} 6 s^{2}), Nd (4 f^{1} 6 s^{2}), Eu (4 f^{7} 6 s^{2})

and

Dy (4 f^{10} 6 s^{2})

, the elements having highest and lowest

3

rd ionisation energies, respectively are

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Match List-I with List-II and select the correct answer using the codes given below:

List-I		List-II
(A)	Electronic configuration of americium.	1.	Corrosive Sublimate
(B)	$BM$ of ${Sm}^{3 +}, {La}^{3 +}, {Gd}^{3 +}$	2.	$[Rn] 5 f^{7} s^{2}$
(C)	$TiC l_{4} \overset{H_{2} O}{\to}$ Amphoteric white solid	3.	$5.9, 0.0, 7.94$
(D)	${Hg}_{2} C l_{2} \overset{aqua - regia}{\to}$ Compound used in antiseptic and dressing skin	4.	${TiO}_{2}$

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Incorrect statement with reference to

Ce

(Z = 58)

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Define lanthanoid contraction. Write two consequences of lanthanoid contraction.

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Read the following statements and choose the correct option.
(i) $f$ -block elements of $6^{th}$ period are called lanthanoids.
(ii) $f$ -block elements of $7^{th}$ period are called actinoids.

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Write the uses of lanthanoid and actinoids.

MEDIUM

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

The radioactive lanthanide among the following is:

EASY

Chemistry>Inorganic Chemistry>d- and f-Block elements>Introduction to Lanthanoids

Which trivalent ion has a maximum size in the Lanthanoid series i.e., Lanthanum ion (