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Created on February 10, 2022

Chemistry Ch 4 Class 12 d and f Block Elements

1 / 42

Which is the correct electronic configuration of Chromium (24Cr)?

UHS 2018
Chemistry
d and f Block Elements
Elimination Tool:

A) 1s2, 2s2, 3s2, 2p6, 3p6, 4s2, 3d6

B) 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d4

C) 1s1, 2s2, 2p6, 3s2, 3p6, 3d6

D) 1s2, 2s2, 2p6, 3s2, 3p6, 4s1, 3d5

2 / 42

Both 02 and 03 are Oxidizing agents but 02 is preferred because:

It is relatively unstable than 02

It provides an extra oxygen atom then 02

It provides Nascent Oxygen

All of above

3 / 42

Which member of 5A group has no stable isotope?

Phosphorous

Bismuth

Nitrogen

Arsenic

4 / 42

Oxidation Number of all the elements in the free state is?

PMC Practice 5
Chemistry
d and f Block Elements
Elimination Tool:

A) Unity

B) Positive

C) Zero

D) Negative

5 / 42

Copper is a typical transition metal. Its atomic number is 29. In which oxidation state does it have a partially filled orbital in d-subshell?

UHS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) Cu

B) Cu+

C) Cu-

D) Cu2+

6 / 42

Copper reacts with hot concentrated H2SO4 in presence of

Air

Water

Ammonia

Strong heat

7 / 42

Choose the correct IUPAC name for the following complex.

[Cr(NH3)4Cl2]Cl

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) Trichlorotetra amine chromium (lII)

B) Dichlorotetra amine chromium (III) chloride

C) Dichloro Tetra ammonia chromium (III) chloride

D) Dichlorotetra amine chromate (lll) chloride

8 / 42

In rhombic sulphur there are atoms in each molecule?

9 / 42

What are interstitial compounds?

PMC Sample 2
Chemistry
d and f Block Elements
Elimination Tool:

A) Transition elements containing small proportion of H, B, C, N

B) Transition elements containing small proportion of He, Ne, Ar, Xe

C) The compounds in which transition elements are in their highest oxidation state.

D) The compounds of transition elements which are not stable.

10 / 42

Paramagnetic elements contain:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) All paired electrons

B) All unpaired electrons

C) Few unpaired electrons.

D) Unequal electrons and protons

11 / 42

Ligands having two lone pair of electrons for donation to the central transition metal ion are known as:

UHS 2018
Chemistry
d and f Block Elements
Elimination Tool:

A) Polydentate ligands

B) Monodentate ligand

C) Bidentate ligands

D) Hexadentate ligands

12 / 42

Gas which has percentage equal to 78% In air Is the

Oxygen

Hydrogen

Carbon dioxide

Nitrogen

13 / 42

Which one of the following elements has six valence electrons?

14 / 42

Which one of the following Is a vulcanizing agent?

Sodium

Iron

Sulphur

Potassium

15 / 42

Which of the following sets is of coinage metals?

PMC Sample 2
Chemistry
d and f Block Elements
Elimination Tool:

A) Cu, Ag, Au

B) Zn, Cd, Hg

C) Au, Ag, Zn

D) Li, Na, K

16 / 42

Which one of the following does not have allotropes?

17 / 42

The colour of transition metal complexes is due to:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) d-d transition of electrons.

B) Paramagnetic nature of transition elements

C) Loss of s-electrons

D) Refraction phenomenon

18 / 42

The transition elements belongs to Group VI B are

PMC Practice 6
Chemistry
d and f Block Elements
Elimination Tool:

A) Zn, Cd, Hg

B) Fe, Ru, Os

C) Mn, Te, Re

D) Cr, Mo, W

19 / 42

In which of the following the oxidation state of S is the highest

SO2

SCl2

H2SO4

H2S03

20 / 42

Which of the following does not occur in Free State?

Nitrogen

Phosphorous

Oxygen

Sulphur

21 / 42

D block elements are also called as ____ ?

PMC Practice 1
Chemistry
d and f Block Elements
Elimination Tool:

A) Rare earth elements

B) Outer transition elements

C) Inner transition elements

D) Typical transition elements

22 / 42

Unpaired electron trend of transition elements:

PMC 2021 Tested
Chemistry
d and f Block Elements
Elimination Tool:

A) Increases till Mn and decreases till Zn

B) Remains unchanged

C) Decreases

D) Increase

23 / 42

Formula of laughing gas is?

NH4

N20

NO3

24 / 42

Nitrogen has oxides:

Several

25 / 42

The geometry of the complex compounds usually depends upon:

PMC 2021 Tested
Chemistry
d and f Block Elements
Elimination Tool:

A) All of the given choices

B) Hybridization of central metal

C) Type of ligands

D) Types of hybridization in the elements of ligands

26 / 42

The ligand field effect splits five degenerate d-orbitals into two sets with different energies, the pair of high energy degenerate orbitals is:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) dxy, dyz

B) dyz, dzx

C) dx2 ,d

D) dx2 – y2, dy2

27 / 42

Au3+ has __________ configuration.

PMC Practice 5
Chemistry
d and f Block Elements
Elimination Tool:

A) 5d7

B) 4d9

C) 5d8

D) 5d10

28 / 42

H3PO3 is

Weak reducing agent

Strong reducing agent

Strong oxidizing agent

Weak oxidizing agent

29 / 42

d-block elements are present _____________ in the periodic table ?

PMC Sample 3
Chemistry
d and f Block Elements
Elimination Tool:

A) Right of the periodic table

B) Left of the periodic table

C) Bottom of periodic table

D) Between s and p block elements

30 / 42

Which of the following properties are associated with transition metals?

PMC Practice 6
Chemistry
d and f Block Elements
Elimination Tool:

A) Color

B) Complex formation

C) Use as catalyst

D) All of these

31 / 42

The correct electronic configuration of Cr is:

PMC Practice 4
Chemistry
d and f Block Elements
Elimination Tool:

A) [Ar] 4s23d4

B) [Ar] 4s23d5

C) [Ar] 4s13d4

D) [Ar] 4s13d5

32 / 42

Which of these is not an isotope of Phosphorus?

Red Phosphoru

Black Phosphorus

White Phosphorus

Gray Phosphorus

33 / 42

Which transition metal is used the most in industries?

PMC 2021 Tested
Chemistry
d and f Block Elements
Elimination Tool:

A) Fe

B) Mg

C) Ca

D) C

34 / 42

The shape of [Co(NH3)6]3+ complex is:

UHS 2018
Chemistry
d and f Block Elements
Elimination Tool:

A) Linear

B) Square planar

C) Tetrahedral

D) Octahedral

35 / 42

The chemical name of K2[Zn(OH)4] is:

NTS 2019
Chemistry
d and f Block Elements
Elimination Tool:

A) Potassium tetrahydroxyzinc (II)

B) Potassium tetrahydroxozincate (II)

C) Potassium tetrahydroxyzincate (VI)

D) Potassium hydroxyzinc (II)

36 / 42

Which of the following is typical transition element?

PMC Practice 4
Chemistry
d and f Block Elements
Elimination Tool:

A) Zn

B) Cd

C) Cu

D) Hg

37 / 42

Which of the following has allotropic forms:

Oxygen

Sulphur

Both

None of these

38 / 42

The formula of Chile Peter salt is

NaCI

NaNO3

NaOH

NaNO4

39 / 42

F-block elements are called?

PMC Practice 1
Chemistry
d and f Block Elements
Elimination Tool:

A) Inner transition

B) Outer transition

C) Both

D) None

40 / 42

H2SO4 is used in industries of?

Paint

Textile

Rubber

Aluminum

41 / 42

Which statement is true for K2(Cu(CN)4) ?

PMC Practice 4
Chemistry
d and f Block Elements
Elimination Tool:

A) Potassium tetra cyano cuprate

B) Coordination number is 2

C) The ligand is positively charged

D) Central atom is present in the anionic sphere

42 / 42

Hardness of transition metals is due to ______?

PMC Practice 6
Chemistry
d and f Block Elements
Elimination Tool:

A) More melting point

B) More electrons

C) Variable oxidation state

D) Higher binding energies

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