d-Block and f-Block Elements Test

Question 1
1 / -0

Which of the following statements is incorrect?

A
Besides the common +3 oxidation state, actinoids can exhibit +4, +5, +6 and +7 oxidation states.

B
Actinoids are less basic than lanthanoids.

C
Actinoids are radioactive.

D
Actinoids have a greater tendency for complex formation.

Question 2
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Which among the following is the coinage metal?

A
Cobalt

B
Copper

C
Chromium

D
Nickel

Question 3
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Which of the following is not a coinage metal?

A
Copper

B
Silver

C
Gold

D
Platinum

Question 4
1 / -0

4d transition elements series are from

A
Sc to Zn

B
Ce to Lu

C
Y to Cd

D
La to Hg

Question 5
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In which of the following species is manganese in the lowest oxidation state?

A
Mn₂O₇

B
MnO₄^-

C
MnO₄^2-

D
MnF₄

Question 6
1 / -0

The f – block elements are known as

A
Representative elements

B
Inner transition elements

C
Transition elements

D
Inert elements

Question 7
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The highest oxidation state of Cr is

A
+4

B
+5

C
+6

D
+7

Question 8
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The last element of the third transition series is

A
Zn

B
Cd

C
Hg

D
Au

Question 9
1 / -0

Which of the following statements is incorrect?

A
Successive shrinkages in the atomic size are referred to as lanthanoid contractions.

B
Actinoids are more reactive than lanthanoids.

C
Salts of La³⁺ and Lu³⁺ are colourless.

D
Eu²⁺ and Yb²⁺ are good oxidising agents.

Question 10
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Which among the following species has a radius greater than that of Fe³⁺?

A
Co³⁺

B
Ni⁴⁺

C
Fe²⁺

D
None of the above

Question 11
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Which of the following pairs of elements exhibits the stable configuration of half-filled 4f-orbitals?

A
Yb and Lu

B
Eu and Gd

C
La and Eu

D
Gd and Yb

Question 12
1 / -0

Directions: The following question has four choices, out of which ONLY ONE is correct.

Which of the following compounds is coloured?

A
ZnSO₄

B
TiO₂

C
CrCl₃

D
ScCl₃

E
ZnCl₂

Question 13
1 / -0

Which of the following statements is incorrect?

A
All the elements of the lanthanide series resemble each other very closely.

B
4f and 5f orbitals are equally shielded.

C
d-block elements show irregular and erratic chemical properties among themselves.

D
Lanthanides are also called rare earth elements.

Question 14
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The species with the largest and smallest radii among the 3d series are respectively

A
Sc and Co

B
Sc and Zn

C
Cr and Mn

D
Zn and Sc

Question 15
1 / -0

Equivalent weight of KMnO₄ in acidic medium is

A
58 g

B
31.6 g

C
52.8 g

D
158 g

Question 16
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Cu⁺ ion is not stable in aqueous solutions and it invariably exists as Cu²⁺ in them because

A
second ionisation energy of Cu is lower than the first

B
hydration energy of Cu¹⁺ is higher

C
hydration energy of Cu²⁺ is higher

D
second ionisation energy of Cu is higher

Question 17
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To which of the following categories will the given reaction belong?

2Cu⁺Cu + Cu²⁺

A
Oxidation

B
Displacement

C
Reduction

D
Disproportionation

Question 18
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Which of the following pairs represents good reducing and oxidising agents, respectively?

A
La³⁺ and Eu²⁺

B
Tb⁴⁺ and Eu²⁺

C
Yb³⁺ and Eu²⁺

D
Yb²⁺ and Eu²⁺

Question 19
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The inner transition metals of 5f series is known as

A
Actinoids

B
Zirconium

C
Lanthanoids

D
None of these

Question 20
1 / -0

For Cr, the states +2, +3 +4 and +1 are well known, but the most stable state(s) amongst these is/are

A
+2

B
+3

C
+4

D
+1

Question 21
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Which among the following elements does not belong to first transition series?

A
Chromium

B
Zinc

C
Silver

D
Copper

Question 22
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The number of unpaired electrons in Mn²⁺(25) is

A
2

B
3

C
4

D
5

Question 23
1 / -0

Directions: The following question has four choices, out of which ONLY ONE is correct.

Potassium permanganate is reduced to Mn²⁺ in acidic solution.
MnO₄^– + 8H⁺ + 5e^– Mn²⁺ + 4H₂O
In neutral or weakly basic medium, however, it is reduced to Mn (IV) state.
MnO₄^–+ 2H₂O + 3e^– MnO₂ + 4OH^–
In acidic medium, Cr₂O₇^2- is reduced to Cr³⁺.
Cr₂O₇^2–+ 14H⁺ + 6e^– 2Cr³⁺ + 7H₂O

100 ml of a 0.1 M solution of a reducing agent whose equivalent weight is equal to its molecular weight in both acidic and alkaline media requires 75 ml of a KMnO₄ solution in acidic medium for complete oxidation. What is the molar concentration of the KMnO₄ solution if the titration is carried out in alkaline medium?

A
0.133 M

B
0.0267 M

C
0.0333 M

D
None of these

Question 24
1 / -0

Transition metal compounds are usually coloured. This is due to the electronic transitions

A
from s-orbital to p-orbital

B
from p-orbital to d-orbital

C
from s-orbital to d-orbital

D
within d-orbitals

Question 25
1 / -0

Compounds of most lanthanoids occur in +3 oxidation state. Which of the following formulae of the compounds of lanthanoids is incorrect?

A
Sulphides, Ln₂S₃

B
Oxides, Ln₂O₃

C
Nitrides, LnN₃

D
Hydroxides, Ln(OH)₃

Submit Test

d-Block and f-B...

Question 1

Besides the common +3 oxidation state, actinoids can exhibit +4, +5, +6 and +7 oxidation states.

Actinoids are less basic than lanthanoids.

Actinoids are radioactive.

Actinoids have a greater tendency for complex formation.

Question 2

Cobalt

Copper

Chromium

Nickel

Question 3

Copper

Silver

Gold

Platinum

Question 4

Sc to Zn

Ce to Lu

Y to Cd

La to Hg

Question 5

Mn2O7

MnO4-

MnO42-

MnF4

Question 6

Representative elements

Inner transition elements

Transition elements

Inert elements

Question 7

+4

+5

+6

+7

Question 8

Zn

Cd

Hg

Au

Question 9

Successive shrinkages in the atomic size are referred to as lanthanoid contractions.

Actinoids are more reactive than lanthanoids.

Salts of La3+ and Lu3+ are colourless.

Eu2+ and Yb2+ are good oxidising agents.

Question 10

Co3+

Ni4+

Fe2+

None of the above

Question 11

Yb and Lu

Eu and Gd

La and Eu

Gd and Yb

Question 12

ZnSO4

TiO2

CrCl3

ScCl3

ZnCl2

Question 13

All the elements of the lanthanide series resemble each other very closely.

4f and 5f orbitals are equally shielded.

d-block elements show irregular and erratic chemical properties among themselves.

Lanthanides are also called rare earth elements.

Question 14

Sc and Co

Sc and Zn

Cr and Mn

Zn and Sc

Question 15

58 g

31.6 g

52.8 g

158 g

Question 16

second ionisation energy of Cu is lower than the first

hydration energy of Cu1+ is higher

Mn₂O₇

MnO₄^-

MnO₄^2-

MnF₄

Salts of La³⁺ and Lu³⁺ are colourless.

Eu²⁺ and Yb²⁺ are good oxidising agents.

Co³⁺

Ni⁴⁺

Fe²⁺

ZnSO₄

TiO₂

CrCl₃

ScCl₃

ZnCl₂

hydration energy of Cu¹⁺ is higher

hydration energy of Cu²⁺ is higher

La³⁺ and Eu²⁺

Tb⁴⁺ and Eu²⁺

Yb³⁺ and Eu²⁺

Yb²⁺ and Eu²⁺

Sulphides, Ln₂S₃

Oxides, Ln₂O₃

Nitrides, LnN₃

Hydroxides, Ln(OH)₃