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d and f Block elements - 01

Total questions: 60

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

Which block of elements are known as transition elements?

a)

s block

b)

p block

c)

d block

d)

f block

2.

Electronic configuration of d- block element is

a)

n d 1-10 ns 1

b)

(n-2) d 1-10 ns 1-2

c)

(n-1) d 1-10 ns 1-2

d)

(n-1) d 1-6 ns 1-2

3.

The transition elements are those elements which have ........ in their ground state or in any one of

their oxidation states.

a)

completely filled (partly filled) d-subshell

b)

incompletely filled (partly filled) d-subshell

c)

empty d subshell

d)

None of these

4.

The d-block Elements consists of how many rows ?

a)

2

b)

3

c)

4

d)

5

5.

Each rows of d-block elements has ........elements.

a)

5

b)

8

c)

9

d)

10

6.

First transition series is also known as

a)

3 d series

b)

4 d series

c)

5 d series

d)

None of these

7.

The magnetic moment of Mn2+ is

a)

4.5

b)

5.0

c)

5.9

d)

2.3

8.

Anomalous electronic configuration in the 3d series are of

a)

Cr and Fe

b)

Cu and Zn

c)

Fe and Cu

d)

Cr and Cu

9.

Transistion elements form alloys easily because they have

a)

Same atomic number

b)

Same electronic configuration

c)

Nearly same atomic size

d)

None of the above

10.

The property which is not characteristic of transistion metals is

a)

variable oxidation states.

b)

tendency to form complexes.

c)

formation of coloured compounds.

d)

natural radioactivity.

11.

Which of the following has the maximum number of unpaired electrons?

a)

Cu2+

b)

Ti3+

c)

V3+

d)

Fe2+

12.

Which of the transition element exhibit only one oxidation state?

a)

Mn

b)

Cu

c)

Sc

d)

Ti

13.

Reason for lanthanoid contraction is

a)

Very poor shielding effect of f orbital

b)

decrease in nuclear charge

c)

Increase in nuclear charge

d)

Increase in shielding effect

14.

In which of the following pairs, both the ions are coloured in aqueous solutions?

[Atomic no of Sc = 21, Ti = 22, Ni = 28, Co = 27, Cu = 29]

a)

Sc3+, Ti

b)

Sc3+, Co2+

c)

Ni2+, Cu+

d)

Ni2+, Ti3+

15.

The electronic configuration of Cu(II) is 3d9 whereas that of Cu(I) is 3d10. Which of the following is correct?

a)

Cu(II) is more stable in aqueous solution

b)

Cu(II) is less stable in aqueous solution

c)

Cu(I) and Cu(II) are equally stable

d)

Stability of Cu(I) and Cu(II) depends on nature of copper salts

16.

Generally transition elements form coloured salts due to the presence of unpaired electrons. Which of the following compounds will be coloured in solid state?

a)

Ag2SO4

b)

CuF2

c)

ZnCl2

d)

Cu2Cl2

17.

Which of the following are d-block elements but not regarded as transistion elements?

a)

Cu, Ag, Au

b)

Zn, Cd, Hg

c)

Fe, Co, Ni

d)

Ru, Rh, Pd

18.

Which one of the following characteristics of the transistion metals is associated with higher catalytic activity?

a)

High enthalpy of atomisation

b)

Paramagnetic behaviour

c)

Colour of hydrate ions

d)

Variable oxidation states

19.

The acidic , basic and amphoteric nature of Mn2O7, V2O5 and CrO are respectively

a)

acidic, acidic and basic

b)

basic, amphoteric and acidic

c)

acidic, amphoteric and basic

d)

acidci, basic and amphoteric

20.

The number of unpaired electron in Mn3+, Cr3+, and V3+ are and respectively most stable ion is

a)

4, 3 and 2 and V3+ is most stable

b)

3,3 and 2 and Cr3+ is most stable

c)

4, 3 and 2 and Cr3+ is most stable

d)

3,3 and 2 and Mn3+ is most stable

21.

Which of the following statement is incorrect regarding Zinc metal

a)

Most of its compound are white in colour

b)

Zinc have high enthalpy of atomization

c)

it have fully field d orbital

d)

It is di-magnetic .

22.

What are typical oxidation state for Sc?

a)

-3

b)

+3

c)

-1

d)

+1

23.

What is the coordination number?

[Fe(H2O)6 ]Cl2

a)

1

b)

2

c)

4

d)

6

24.

d-block elements loses first elecrton(s) from...

a)

3p

b)

3s

c)

3d

d)

4s

25.
One metal that is liquid at room temperature is
a)
magnesium
b)
manganese
c)
mercury
d)
sodium
26.
Which is a chemical property of metals
a)
Thermal conductivity
b)
Corrosion
c)
Electrical Conductivity
d)
Magnetism
27.
Sc3+ solution in the presence of water is colorless. Why?
a)
Presence of ligands cause the splitting of 3d orbital.
b)
There is no splitting of 3d orbitals
c)
There is no electrons to be excited
d)
Energy level is too high for electron to reach
28.
What is the correct formula for chromate ion?
a)
Cr2O7²⁻
b)
ClO₂⁻
c)
CrO₄²⁻
d)
HCO₃⁻
29.
Which of the following is NOT a transition metal?
a)
Iron
b)
Gold
c)
Titanium
d)
Radium
30.
3d orbitals are degenerate. What does it means?
a)
All 3d orbitals are in same order
b)
All 3d orbitals have different electron arrangement
c)
All 3d orbitals are in the same energy level
d)
All 3d orbitals have the same shape
31.

The most common oxidation state of lanthanoids is-:

a)

+4

b)

+3

c)

+6

d)

+2

32.

Which of the following elements belong to actinoid-:

a)

Cerium

b)

Lutetium

c)

Thorium

d)

Lanthanum

33.

Which element among the lanthanoids has the smallest atomic radius ?

a)

Ce

b)

Lu

c)

Eu

d)

Gd

34.

The general electronic configuration [Rn]5f1-14 6d0-1 7s2 is of -:

a)

Lanthanoids

b)

Actinoids

c)

s- block elements

d)

d-block elements

35.

An atom with atomic number 21 belongs to category of-:

a)

s- block elements

b)

p-block elements

c)

d-block elements

d)

f-block elements

36.

The number of unpaired d electrons retained in Fe+2 (Z= 26) ion is -:

a)

3

b)

4

c)

5

d)

6

37.

d-d transition is possible only in-:

a)

Cu+1

b)

Cu+2

c)

Zn+2

d)

Zn

38.

The general electronic configuration [Xn]4f1-14 5d0-1 6s2 is of-:

a)

Lanthanoids

b)

Actinoids

c)

s- block elements

d)

d-block elements

39.

Which of the following transition elements is used as a catalyst in Haber’s process?

a)

Fe

b)

Ni

c)

Ti

d)

V

40.

Which of the following is the least basic in nature-

a)

La(OH)3

b)

Ce(OH)3

c)

Yb(OH)3

d)

Lu(OH)3

41.

The metal ion which is NOT coloured is-:

a)

Ti+3

b)

Fe+3

c)

V+2

d)

Zn+2

42.

Which of the following compounds is expected to be coloured?

a)

AgNO3

b)

CuSO4

c)

ZnCl2

d)

CuCl

43.

•Which of the following ion is diamagnetic in nature?

a)

Fe+3

b)

Sc +3

c)

Cr+2

d)

Cu+2

44.

Highest magnetic moment is shown by the ion-:

a)

Cr+3

b)

Fe+3

c)

Co+3

d)

V+2

45.

The most stable oxidation state of Ti is-:

a)

+5

b)

+2

c)

+3

d)

+4

46.

Ion size of lanthanide is _____

a)

Increase from La-Lu

b)

Decrease from Lu-La

c)

Decrease from La-Lu

d)

Increase from Ac-Th

47.

Which of the following lanthanides are used in MRI technology?

a)

Gd

b)

Ge

c)

La

d)

Ce

48.

Which of the following is a correct term lanthanide elements can also be referred to as?

a)

nonmetal

b)

rare-earth metals

c)

alkaline earth metal

d)

halogen

49.

Amonst the following outer most configuration of transition metal which shows highest oxidation state ?

a)

3d34s2

b)

3d54s1

c)

3d54s2

d)

3d64s2

50.

the lanthanoid contraction is responsible for the fact that

a)

Zr and Y have about the same radii

b)

Zr and Nb have similar oxidation state

c)

Zr and Hf have about the same radii

d)

Zr and Zn have the same oxidation state

51.

the electronic configuration of Gadolinium (at no 64) is

a)

[xe] 4f8 5d0 6s2

b)

[xe] 4f3 5d5 6s2

c)

[xe] 4f6 5d0 6s2

d)

[xe] 4f7 5d1 6s2

52.

Which of the following ion is is colourless

a)

Cu+

b)

Co2+

c)

Ni2+

d)

fe3+

53.

the group of elements in which the electron enters the antipenultimate shell is called

a)

s block

b)

p block

c)

d block

d)

f block

54.

Titanium shows magnetic moment of 1.73BM in its compound . What is the oxidation state of Ti in the compound

a)

1

b)

4

c)

3

d)

2

55.

in transition series with the increase in atomic no. paramagnetism

a)

increases gradually

b)

decreases gradually

c)

increases to amaximum and then decreases

d)

decreases to a minimum then increases

56.

A: each transition series consist of 10 elements

r: maximum capacity of d subshell is 10

a)

A true R true and correct reason

b)

A true R true and incorrect reason

c)

A false R true

d)

A false R false

57.

A fe 2+ acts as a reducing agent

R: Fe3+ has stable d5 configuration

a)

A true R true and correct reason

b)

A true and r true incorrect reason

c)

A false R true

d)

A false r false

58.

Which of the following is not a common property of the transition metals?

a)

They form multiple stable ions.

b)

They are good catalysts.

c)

They are easily vaporized

d)

They form colorful ions.

59.

Which of the following statements explains why platinum, palladium, and rhodium are used in converters in car exhausts?

a)

Transition metals make good catalysts

b)

Transition metals react slowly or not at all with acid.

c)

Transition metals have high melting points.

d)

Transition metals form colored compounds.

60.

Which of the following period 4 oxides is used as either a physical or a chemical sunscreens in many types of commercial sunblock?

a)

TiO2

b)

CuO

c)

VO25

d)

MnO2

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