Class 12 Chemistry - Chapter 8: The d-and f-Block Elements MCQ Questions

35 Questions 70 Minutes

Progress: 0 / 35

Your Class 12 Chemistry Study Path

Question 1

Misch metal is an alloy of

A none of these

B Ac

C Th

D La

Question 2

Which one is coloured?

A [Ti(H₂O)₆]³⁺

B [Zn(H₂O)₆]²⁺

C [SC(H₂O)₆]³⁺

D Cu₂Cl₂

Question 3

Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d⁵. What is its atomic number?

A 24

B 27

C 26

D 25

Question 4

On addition of small amount of KMnO₄ to concentrated H₂SO₄, a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following.

A Mn₂O₃

B MnSO₄

C MnO₂

D Mn₂O₇

Question 5

Which of the following statements is not correct?

A Ti²⁺ and Cr²⁺ are reducing agents in aqueous solution.

B Mn³⁺ and Co³⁺ are oxidising agents in aqueous solution.

C In its higher oxidation states, manganese forms stable compounds with oxygen and fluorine.

D Copper liberates hydrogen from acids.

Question 6

Which of these elements will have highest density?

A Cu

B Co

C Ni

D Fe

Question 7

Interstitial compounds are formed when small atoms are trapped inside the crystal lattice of metals. Which of the following is not the characteristic property of interstitial compounds?

A They are chemically very reactive

B They retain metallic conductivity

C They are very hard

D They have high melting points in comparison to pure metals

Question 8

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 Cu₂ Cl₂

B ZnF₂

C CuF₂

D Ag₂ SO₄

Question 9

Mn₂O₇, CrO₃, Cr₂O₃, CrO, V₂O₅, V₂O₄

A V₂O₅, V₂O₄

B CrO, V₂O₅

C Mn₂O₇, CrO₃

D V₂O₅, Cr₂O₃

Question 10

The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of Cr³⁺ ion is

A 3.57 B.M.

B 3.47 B.M.

C 3.87 B.M.

D 2.87 B.M.

Question 11

When KMnO₄solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because

A Mn²⁺ acts as autocatalyst

B MnO₄^– catalyses the reaction

C Reaction is exothermic

D CO₂ is formed as the product

Question 12

Which of the following titanium compounds cannot be prepared? (Atomic No. of Ti = 22)

A TiCl₂

B K₂TiO₄

C TiO₂

D TiO

Question 13

Which of the following is the correct electronic configuration of gadolinium?

A [Xe]4f⁹ 5s¹

B [Xe] 4f⁸ 6dÂ²

C [Xe] 4f⁶ 5dÂ² 6sÂ²

D [Xe] Af⁷ 5d¹6sÂ²

Question 14

Increasing order of paramagnetism is

A Mn²⁺, CO²⁺, Ni²⁺, Cu²⁺

B Cu²⁺, Ni²⁺, CO²⁺, Mn²⁺

C CO²⁺, Cu²⁺, Mn²⁺, Ni²⁺

D Cu²⁺ CO²⁺, Mn²⁺, Ni²⁺

Question 15

KMnO₄ acts as an oxidising agent in acidic medium. The number of moles of KMnO₄ that will be needed to react with one mole of sulphide ions in acidic solution is

A 1/5

B 4/5

C 3/5

D 2/5

Question 16

Copper sulphate dissolves in excess of KCN to give:

A [Cu(CN₂].

B CuCN

C [CU(CN)₄]^2-

D [CU(CN)₄]^3-

Question 17

The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition element, which shows highest magnetic moment.

A 3d²

B 3d⁸

C 3d⁵

D 3d⁷

Question 18

Electronic configuration of Cr (Z = 24) is

A none of these

B 3d⁵ 4s¹

C 3d⁶ 4s⁰

D 3d⁴ 4s²

Question 19

Electronic configuration of Fez+ ion is

A [Ar] 3d⁸

B [Ar] 3d⁶

C [Ar] 4s¹3d⁵

D [Ar] 4s²3d⁴

Question 20

Which of the following is not a lanthanoid element?

A Thorium

B Lutetium

C Europium

D Cerium

Question 21

Why is HCI not used to make the medium acidic in oxidation reactions of KMnO₄ in acidic medium?

A KMnO₄ acts as a reducing agent in the presence of HCl.

B KMnO₄ is a weaker oxidising agent than HCl.

C KMnO₄ oxidises HCl into Cl₂ which is also an oxidising agent.

D Both HCl and KMnO₄ act as oxidising agents.

Question 22

Maximum oxidation number of manganese is in

A Mn₂O₄

B KMnO₄

C MnO₂

D K₂MnO₄

Question 23

Which of the following is not an actinoid?

A Terbium

B Uranium

C Californium

D Thorium

Question 24

Highest oxidation state of manganese in fluoride is +4 (MnF₄) but highest oxidation state in oxides is +7 (Mn₂O₇) because

A in covalent compounds fluorine can form single bond only while oxygen forms double bond.

B fluorine stabilises lower oxidation state.

C fluorine does not possess d-orbitals.

D fluorine is more electronegative than oxygen.

Question 25

There are 14 elements in actinoid series. Which of the following elements does not belong to this series?

A Fm

B Tm

C Np

D U

Question 26

Which of the following would be diamagnetic?

A Ti³⁺

B Cd²⁺

C Ni²⁺

D Cu²⁺

Question 27

Which transition metal can show highest oxidation state?

A In

B Os

C Ti

D Sc

Question 28

Which is colourless in H₂O?

A Sc³⁺

B Cr³⁺

C V³⁺

D Ti³⁺

Question 29

(iv) 2MnO₄^– + 3Mn²⁺ + 2H₂O â†’ 5MnO₂ + 4H⁺

A i, iv

B ii, iii, iv

C i, ii, iii

D i, ii

Question 30

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

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

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

C Cu (II) is less stable

D Cu (II) is more stable

Question 31

Maximum magnetic moment is shown by

A 3d⁵

B 3d⁹

C 3d⁷

D 3d⁸

Question 32

Which of the following oxidation state is common for all lanthanoids?

A +5

B +4

C +3

D +2

Question 33

Although Zirconium belongs to 4d transition series and Hafnium to 5d transition series even then they show similar physical and chemical properties because

A both belong to the same group of the periodic table

B both have similar atomic radius

C both have same number of electrons

D both belong to d-block

Question 34

When alkaline KMnO₄ is treated with Kl, iodide ion is oxidised to

A lO₄^–

B lO₃^–

C lO^–

D l₂

Question 35

When acidified K₂Cr₂O₇ solution is added to Sn²⁺ salts then Sn²⁺ changes to

A Sn⁺

B Sn⁴⁺

C Sn³⁺

D Sn

Related Student Tools

P0 academic

Grade Calculator

Convert marks into grade bands with transparent thresholds.

P0 academic

Marks Percentage Calculator

Calculate exam or subject-wise marks percentage.

P0 academic

Percentage Calculator

Calculate percentage from obtained marks and total marks.

Keep learning

Discover More on SaralStudy

Explore all articles

Latest Blogs

Fresh educational articles and updates.

Popular Blogs

Most-read articles from SaralStudy.

Quick & Popular Links

Fast access to frequently used study resources.

Quick Links

NCERT Sample Papers Study Planner and Calculators NCERT Books CBSE Syllabus Previous Year Question Papers CBSE Board

What Students Are Viewing

Recently viewed articles based on SaralStudy activity.

Class 12 Chemistry - Chapter 8: The d-and f-Block Elements MCQ Questions

Your Class 12 Chemistry Study Path

Misch metal is an alloy of

Which one is coloured?

Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number?

On addition of small amount of KMnO4 to concentrated H2SO4, a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following.

Which of the following statements is not correct?

Which of these elements will have highest density?

Interstitial compounds are formed when small atoms are trapped inside the crystal lattice of metals. Which of the following is not the characteristic property of interstitial compounds?

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

Mn2O7, CrO3, Cr2O3, CrO, V2O5, V2O4

The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of Cr3+ ion is

When KMnO4 solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because

Which of the following titanium compounds cannot be prepared? (Atomic No. of Ti = 22)

Which of the following is the correct electronic configuration of gadolinium?

Increasing order of paramagnetism is

KMnO4 acts as an oxidising agent in acidic medium. The number of moles of KMnO4 that will be needed to react with one mole of sulphide ions in acidic solution is

Copper sulphate dissolves in excess of KCN to give:

The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition element, which shows highest magnetic moment.

Electronic configuration of Cr (Z = 24) is

Electronic configuration of Fez+ ion is

Which of the following is not a lanthanoid element?

Why is HCI not used to make the medium acidic in oxidation reactions of KMnO4 in acidic medium?

Maximum oxidation number of manganese is in

Which of the following is not an actinoid?

Highest oxidation state of manganese in fluoride is +4 (MnF4) but highest oxidation state in oxides is +7 (Mn2O7) because

There are 14 elements in actinoid series. Which of the following elements does not belong to this series?

Which of the following would be diamagnetic?

Which transition metal can show highest oxidation state?

Which is colourless in H2O?

(iv) 2MnO4– + 3Mn2+ + 2H2O â†’ 5MnO2 + 4H+

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

Maximum magnetic moment is shown by

Which of the following oxidation state is common for all lanthanoids?

Although Zirconium belongs to 4d transition series and Hafnium to 5d transition series even then they show similar physical and chemical properties because

When alkaline KMnO4 is treated with Kl, iodide ion is oxidised to

When acidified K2Cr2O7 solution is added to Sn2+ salts then Sn2+ changes to

Practice Complete!

Related Student Tools

Grade Calculator

Marks Percentage Calculator

Percentage Calculator

Students Also Read

Discover More on SaralStudy

Latest Blogs

Popular Blogs

Quick & Popular Links

Quick Links

Popular Study Links

What Students Are Viewing

Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d⁵. What is its atomic number?

On addition of small amount of KMnO₄ to concentrated H₂SO₄, a green oily compound is obtained which is highly explosive in nature. Identify the compound from the following.

Mn₂O₇, CrO₃, Cr₂O₃, CrO, V₂O₅, V₂O₄

The magnetic moment is associated with its spin angular momentum and orbital angular momentum. Spin only magnetic moment value of Cr³⁺ ion is

When KMnO₄solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because

KMnO₄ acts as an oxidising agent in acidic medium. The number of moles of KMnO₄ that will be needed to react with one mole of sulphide ions in acidic solution is

Why is HCI not used to make the medium acidic in oxidation reactions of KMnO₄ in acidic medium?

Highest oxidation state of manganese in fluoride is +4 (MnF₄) but highest oxidation state in oxides is +7 (Mn₂O₇) because

Which is colourless in H₂O?

(iv) 2MnO₄^– + 3Mn²⁺ + 2H₂O â†’ 5MnO₂ + 4H⁺

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

When alkaline KMnO₄ is treated with Kl, iodide ion is oxidised to

When acidified K₂Cr₂O₇ solution is added to Sn²⁺ salts then Sn²⁺ changes to