D and F - Block Elements Test

Question 1
4 / -1

Which one of the following is an electronic configuration of thorium?

A
[Rn] 5f¹6d¹7s²

B
[Rn] 5f²6d²7s⁰

C
[Rn] 5f²6d⁰7s²

D
[Rn] 5f⁰6d²7s²

Question 2
4 / -1

Which of the following is general electronic configuration of actinides?

A
[Rn] 5f^0-146d^0-17s²

B
[Rn] 5f^1-14 6d^0-147s²

C
[Rn] 5f^0-146d²7s²

D
[Rn] 5f¹6d²7s⁰

Question 3
4 / -1

The actinoids Exhibit more member of oxidation states in general than the lanthanoids. This is because

A
the 5f-orbitals are more buried than the 4f-orbita!s

B
there is a similarity between 4f and 5f-orbitals in their angular part of the wave function

C
the actinides are more reactive than the lanthanides

D
the 5f-orbitals extend farther from the nucleus than the 4f-orbitals

Question 4
4 / -1

Identify the incorrect statement among the following.

A
All f-block elements belong to 3rd group

B
Element curium (Z = 96) has 5f⁷ 6d¹7s²

C
The actinides tarnish readily in air

D
4f and 5f-orbitals are equally buried

Question 5
4 / -1

In which 5f subshell is half-filled?

A
Am and Cm

B
Cm and Bk

C
Cm and Cf

D
No and Lr

Question 6
4 / -1

Actinides

A
are all synthetic elements

B
include element 104

C
are highly electropositive and reactive

D
do not show variable oxidation state

Question 7
4 / -1

Which of the following is not an actinide?

A
Curium

B
Californium

C
Uranium

D
Rutherfordium

Question 8
4 / -1

The compound used in enrichment of uranium for nuclear power plant is

A
U₃O₈

B
UF₆

C
UCI4

D
UO₂(NO₂)₂

Question 9
4 / -1

Which one of the following shows oxidation state upto + 7?

A
Am

B
Pu

C
U

D
Cm

Question 10
4 / -1

The general electronic configuration of actinides is (n - 2) f^1-14 (n - 1) d0^-1 ns2.
Which one of the following actinides has one electron in 6d-orbital?

A
Cm (Z = 96)

B
Lr (Z = 103)

C
Np (Z = 93)

D
All of these

Question 11
4 / -1

Which one of the following is a diamagnetic ion?

A
CO²⁺

B
Cu²⁺

C
Mn²⁺

D
Sc³⁺

Question 12
4 / -1

The elements which lie between s and p block elements in the long form periodic table are called as:

A
Actinides

B
d-block elements

C
Lanthanides

D
Electropositive elements

Question 13
4 / -1

Which form of silver is colourless?

A
Ag²⁺

B
Ag

C
Ag³⁺

D
Ag⁺

Question 14
4 / -1

Melting point of d block elements across a period:

A
Increases from left to right

B
Deceases from left to right

C
Increases to a maximum at d⁵ and then decreases with increase of atomic number.

D
Does not change on moving from left to right.

Question 15
4 / -1

The first ionization energy of the d-block elements are?

A
Lesser than p-block elements

B
Between s and p-block elements

C
Lesser than s-block elements

D
Higher than p-block elements

Question 16
4 / -1

Comprehension Type
Direction (Q. Nos. 16 and 17) This section contains a paragraph, describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).
Passage
Rutherford and Soddy found that every uranium ore that they examined contained minute quantities of radium and an appreciable amount of non-radioactive lead. From this, they concluded that uranium is the starting substance in a series of radioactive transformations which pass through radium and ultimately ends with stable lead. These transformations are accompanied by spontaneous emissions of alpha and beta particles resulting in the formation of new atoms. All the nuclei from the initial element to the final stable element constitute a series called disintegration series. Mass number changes by 4 units per each alpha particle emission.
There are four disintegration series. They are
Q.
The number of alpha and beta particles emitted in the nuclear reaction are

A
4α and 1β

B
3α and 7β

C
8α and 1β

D
4α and 7β

Question 17
4 / -1

Rutherford and Soddy found that every uranium ore that they examined contained minute quantities of radium and an appreciable amount of non-radioactive lead. From this, they concluded that uranium is the starting substance in a series of radioactive transformations which pass through radium and ultimately ends with stable lead. These transformations are accompanied by spontaneous emissions of alpha and beta particles resulting in the formation of new atoms. All the nuclei from the initial element to the final stable element constitute a series called disintegration series. Mass number changes by 4 units per each alpha particle emission.
There are four disintegration series. They are
Q.
Lead isotope is the end product in all disintegration series except

A
uranium series

B
thorium series

C
actinium series

D
neptunium series

Question 18
4 / -1

Matching List Type
Direction (Q. No. 18) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

A
a

B
b

C
c

D
d

Question 19
4 / -1

Direction (Q. Nos. 19-23) This section contains 5 questions. When worked out wiil result in an integer from 0 to 9 (both inclusive).

Q. The number of electrons present in 5f subshell of berkelium are

A
9

B
8

C
7

D
6

Question 20
4 / -1

The number of electrons present in 5f subshell of Th⁴⁺ ion are

A
3

B
2

C
1

D
0

Question 21
4 / -1

Number of elements that show + 6 oxidation state among Th, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm are

A
4

B
3

C
5

D
6

Question 22
4 / -1

The number of unpaired electrons in the element with atomic number 100 are

A
1

B
2

C
3

D
4

Question 23
4 / -1

Pb, in this transformation, number of alpha particles (α) liberated

A
8

B
7

C
6

D
3

Question 24
4 / -1

Statement Type

Direction (Q. Nos. 24 and 25) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

Q.

Statement I : Actinides show a large number of oxidation state whereas lanthanides show a limited number of oxidation state.

Statement Il : Energy gap between 4f, 5d and 6s subshells is small whereas that between 5f, 6d and 7s subshell is large.

A
Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

B
Statement I is correct but Statement II is incorrect

C
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

D
Statement II is correct but Statement I is incorrect

Question 25
4 / -1

Statement I : Actinides form relatively less stable complexes as compared to lanthanides.
Statement II : Actinides can utilise their 5f -orbitals along with 6d-orbitals in bonding but lanthanides do not use their 4f-orbitals for bonding.

A
Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I

B
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I

C
Statement I is correct but Statement II is incorrect

D
Statement II is correct but Statement I is incorrect

Submit Test

D and F - Block...

Question 1

[Rn] 5f16d17s2

[Rn] 5f26d27s0

[Rn] 5f26d07s2

[Rn] 5f06d27s2

Question 2

[Rn] 5f0-146d0-17s2

[Rn] 5f1-14 6d0-147s2

[Rn] 5f0-146d27s2

[Rn] 5f16d27s0

Question 3

the 5f-orbitals are more buried than the 4f-orbita!s

there is a similarity between 4f and 5f-orbitals in their angular part of the wave function

the actinides are more reactive than the lanthanides

the 5f-orbitals extend farther from the nucleus than the 4f-orbitals

Question 4

All f-block elements belong to 3rd group

Element curium (Z = 96) has 5f7 6d17s2

The actinides tarnish readily in air

4f and 5f-orbitals are equally buried

Question 5

Am and Cm

Cm and Bk

Cm and Cf

No and Lr

Question 6

are all synthetic elements

include element 104

are highly electropositive and reactive

do not show variable oxidation state

Question 7

Curium

Californium

Uranium

Rutherfordium

Question 8

U3O8

UF6

UCI4

UO2(NO2)2

Question 9

Am

Pu

U

Cm

Question 10

Cm (Z = 96)

Lr (Z = 103)

Np (Z = 93)

All of these

Question 11

CO2+

Cu2+

Mn2+

Sc3+

Question 12

Actinides

d-block elements

Lanthanides

Electropositive elements

Question 13

Ag2+

Ag

Ag3+

Ag+

Question 14

Increases from left to right

Deceases from left to right

Increases to a maximum at d5 and then decreases with increase of atomic number.

Does not change on moving from left to right.

Question 15

Lesser than p-block elements

Between s and p-block elements

Lesser than s-block elements

Higher than p-block elements

Question 16

4α and 1β

3α and 7β

8α and 1β

[Rn] 5f¹6d¹7s²

[Rn] 5f²6d²7s⁰

[Rn] 5f²6d⁰7s²

[Rn] 5f⁰6d²7s²

[Rn] 5f^0-146d^0-17s²

[Rn] 5f^1-14 6d^0-147s²

[Rn] 5f^0-146d²7s²

[Rn] 5f¹6d²7s⁰

Element curium (Z = 96) has 5f⁷ 6d¹7s²

U₃O₈

UF₆

UO₂(NO₂)₂

CO²⁺

Cu²⁺

Mn²⁺

Sc³⁺

Ag²⁺

Ag³⁺

Ag⁺

Increases to a maximum at d⁵ and then decreases with increase of atomic number.