Unit 8 » The d-and f-Block Elements- MCQs (12th) | Chemistry | Objective Questions- 12th

Multiple Choice

ID- 13727

BSEB, 2019 (C)

1. Copper is a member of:

(A) First transition series
(B) Second transition series
(C) Third transition series
(D) Fourth transition series

Sep 18, 2022 at 07:30 PM

Multiple Choice

ID- 13728

BSEB, 2016

2. Oxidation number of gold metal is:

(A) +1
(B) 0
(C) –1
(D) all of these

Sep 18, 2022 at 07:31 PM

Multiple Choice

ID- 13729

BSEB, 2016

3. Shape of d-orbital is:

(A) spherical
(B) dumb-bell
(C) double dumb-bell
(D) none of these

Sep 18, 2022 at 07:33 PM

Multiple Choice

ID- 13730

BSEB, 2016

4. Electronic configuration of alkaline earth element is:

(A) ns²
(B) ns¹
(C) np⁶
(D) ns⁰

Sep 18, 2022 at 07:36 PM

Multiple Choice

ID- 13731

BSEB, 2016

5. Outermost configuration 3d⁶4s²k is of:

(A) Ca
(B) Zn
(C) Mg
(D) Fe

Sep 18, 2022 at 07:38 PM

Multiple Choice

ID- 13732

BSEB, 2015

6. Which one of the following is called green vitriol?

(A) FeSO₄7H₂O
(B) CuSO₄5H₂O
(C) CaSO₄2H₂O
(D) None of these

Sep 18, 2022 at 07:42 PM

Multiple Choice

ID- 13733

BSEB, 2015

7. Which block of elements are known as transition elements?

(A) p-block
(B) s-block
(C) d-block
(D) f-block

Sep 18, 2022 at 07:43 PM

Multiple Choice

ID- 13734

BSEB, 2015

8. Most abundant elements in earth's crust is:

(A) Si
(B) Al
(C) Zn
(D) Fe

Sep 18, 2022 at 07:44 PM

Multiple Choice

ID- 13735

BSEB, 2009, 2013

9. Which one of the following is diamagnetic ion?

(A) Co²⁺
(B) Ni²⁺
(C) Cu²⁺
(D) Zn²⁺

Sep 18, 2022 at 07:48 PM

Multiple Choice

ID- 13736

BSEB, 2015

10. Which of the following in not an an element of first transition series?

(A) Iron
(B) Chromium
(C) Magnesium
(D) Nickel

Sep 18, 2022 at 07:49 PM

Multiple Choice

ID- 13737

11. Fe³⁺ ion is more stable than Fe²⁺ ion because

(A) more the charge on the atom, more is its stability
(B) configuration of Fe²⁺ is 3d⁶ while Fe³⁺ is 3d⁵
(C) Fe²⁺ has a larger size than Fe³⁺
(D) Fe³⁺ ions are coloured hence more stable

Sep 18, 2022 at 07:54 PM

Multiple Choice

ID- 13738

12. Colour of transition metal ions are due to absorption of some wavelength. This result in

(A) d-s transition
(B) s-s transition
(C) s-d transition
(D) d-d transition

Sep 18, 2022 at 07:59 PM

Multiple Choice

ID- 13739

13. Which group contains coloured ions out of the following? 1. Cu⁺ 2. Ti⁴⁺ 3. Co²⁺ 4. Fe²⁺

(A) 1, 2, 3, 4
(B) 3, 4
(C) 2, 3
(D) 1, 2

Sep 18, 2022 at 08:02 PM

Multiple Choice

ID- 13740

14. The melting point of Cu, Ag and Au follow the order:

(A) Cu > Ag > Au
(B) Cu > Au > Ag
(C) Au > Ag > Cu
(D) Ag > Au > Cu

Sep 18, 2022 at 08:04 PM

Multiple Choice

ID- 13793

15. Which of the following pairs of ions have the same electronic configuration?

(A) Cu²⁺, Cr²⁺
(B) Fe³⁺, Mn²⁺
(C) Co³⁺, Ni³⁺
(D) Sc³⁺, Cr³⁺

Sep 19, 2022 at 10:59 AM

Multiple Choice

ID- 13794

16. The melting point of copper is higher than that of zinc because:

(A) copper has a bcc structure
(B) the atomic volume of copper is higher
(C) the d electrons of copper are involved in metallic bonding
(D) the s as well as d electrons of copper are involved in metallic bonding

Sep 19, 2022 at 11:02 AM

Multiple Choice

ID- 13795

17. Zr and Hf have almost equal atomic and ionic redii because of:

(A) diagonal relationship
(B) lanthanoid contraction
(C) actinoid contraction
(D) belonging to the same group

Sep 19, 2022 at 11:04 AM

Multiple Choice

ID- 13796

18. Which of the following is not a amphoteric ion?

(A) Al³⁺
(B) Cr³⁺
(C) Fe²⁺
(D) Zn²⁺

Sep 19, 2022 at 11:05 AM

Multiple Choice

ID- 13797

19. What happens when potassium iodide reacts with acidic solution of potassium dichromate?

(A) It liberates iodine
(B) Potassium sulphate is formed
(C) Chromium sulphate is formed
(D) All the above products are formed

Sep 19, 2022 at 11:08 AM

Multiple Choice

ID- 13798

BSEB, 2018 (C)

20. When Iron power is added in CuSO₄ solution, the blue colour of solution turns:

(A) Black
(B) Green
(C) Brown
(D) Colourless

Sep 19, 2022 at 11:09 AM

Multiple Choice

ID- 13799

21. Which of the following has no unpaired electrons but is coloured?

(A) K₂Cr₂O₇
(B) K₂MnO₄
(C) CuSO₄5H₂O
(D) MnCl₂

Sep 19, 2022 at 11:12 AM

Multiple Choice

ID- 13800

BSEB, 2019 (A)

22. Transition elements are also known as:

(A) s-block elements
(B) p-block elements
(C) d-block elements
(D) f-block elements

Sep 19, 2022 at 11:13 AM

Multiple Choice

ID- 13801

23. Which of the following lanthanide ion is paramagnetic?

(A) Ce⁴⁺
(B) Yb²⁺
(C) Lu³⁺
(D) Eu²⁺

Sep 19, 2022 at 11:15 AM

Multiple Choice

ID- 13802

24. Lanthanoid contraction is due to increase in

(A) atomic number
(B) effective neclear charge
(C) atomic radius
(D) valence electrons

Sep 19, 2022 at 11:17 AM

Multiple Choice

ID- 13803

BSEB, 2021 (A)

25. The metal always found in free state is:

(A) Gold
(B) Silver
(C) Copper
(D) Sodium

Sep 19, 2022 at 11:18 AM

Multiple Choice

ID- 13804

BSEB, 2021 (A)

26. The best way to protect iron from rusting is:

(A) making iron cathode
(B) putting it in saline water
(C) both 'A' and 'B'
(D) none of these

Sep 19, 2022 at 11:19 AM

Multiple Choice

ID- 13805

BSEB, 2021 (A)

27. In which of the following elements 4f energy level is gradually filled?

(A) Lanthanides
(B) Actinides
(C) Transition metals
(D) Coinage metals

Sep 19, 2022 at 11:24 AM

Multiple Choice

ID- 13806

BSEB, 2021 (A)

28. The element showing highest oxidation state among first transition series is:

(A) Ni
(B) Cr
(C) Fe
(D) Mn

Sep 19, 2022 at 11:25 AM

Multiple Choice

ID- 13807

BSEB, 2017 (A)

29. The general electronic configuration of transition elements is:

(A) (n – 1)d⁵
(B) (n –)d^{(1 – 10)}ns^{0.1 or 2}
(C) (n –)d^{(1 – 10)}ns^{1 – 2}
(D) none of these

Sep 19, 2022 at 11:32 AM

Multiple Choice

ID- 13808

BSEB, 2017 (A)

30. The magnetic moment shown by the transition metal ion with the outermost electronic configuration is:

(A) 3d⁵
(B) 3d²
(C) 3d⁷
(D) 3d⁹

Sep 19, 2022 at 11:35 AM

Multiple Choice

ID- 13810

BSEB, 2016 (C)

31. Transition elements are

(A) Metals
(B) None Metals
(C) d-block elements
(D) Gas

Sep 19, 2022 at 11:36 AM

Multiple Choice

ID- 13811

BSEB, 2016 (C)

32. Which of the following elements is liquid at room temperature:

(A) Zn
(B) Hg
(C) Cu
(D) Au

Sep 19, 2022 at 11:37 AM

Multiple Choice

ID- 13813

BSEB, 2016 (C)

33. Which of the following is known as red lead?

(A) Pb₃O₄
(B) Pb₂O₃
(C) PbO
(D) PbO₂

Sep 19, 2022 at 11:39 AM

Multiple Choice

ID- 13815

BSEB, 2017 (C)

34. Which of the following is not a member of first transition elements series?

(A) Cr
(B) Fe
(C) Mg
(D) Mn

Sep 19, 2022 at 11:40 AM

Multiple Choice

ID- 13817

BSEB, 2018 (A)

35. Which of the following has the most stable +2 oxidation state?

(A) Sn
(B) Ag
(C) Fe
(D) Pb

Sep 19, 2022 at 11:41 AM

Multiple Choice

ID- 13822

BSEB, 2018 (A)

36. Mercuric chloride reacts with ammonia gas and form white precipitate. The molecular formula of white precipitate is:

(A) HgCl·2NH₃
(B) Hg(NH₃)₂Cl₂
(C) Hg (NH₂)Cl₂
(D) Hg (NH₂) Cl

Sep 19, 2022 at 11:48 AM

Multiple Choice

ID- 13829

BSEB, 2018 (A)

37. When NaCI solution is added to Fe(OH)₃ colloidal solution then:

(A) [Fe(OH₃)]Fe³⁺ is formed
(B) [Fe (OH₃)]Cl^– is formed
(C) [Fe(OH₃)]Na⁺ is formed
(D) Fe(OH₃) is coagulated

Sep 19, 2022 at 11:57 AM

Multiple Choice

ID- 13831

BSEB, 2018 (A)

38. Which metal nitrate gives colourless gas on thermal decomposition

(A) NaNO₃
(B) Cu(NO₃)₂
(C) Ba(NO₃)₂
(D) Hg(NO₃)₂

Sep 19, 2022 at 12:00 PM

The d-and f-Block Elements

Board » Bihar Board » Class 12th » English Medium » Science » Chemistry » Part-1 » Unit 8: The d-and f-Block Elements

Objective Questions (MCQs)

1. Copper is a member of:

2. Oxidation number of gold metal is:

3. Shape of d-orbital is:

4. Electronic configuration of alkaline earth element is:

5. Outermost configuration 3d64s2k is of:

6. Which one of the following is called green vitriol?

7. Which block of elements are known as transition elements?

8. Most abundant elements in earth's crust is:

9. Which one of the following is diamagnetic ion?

10. Which of the following in not an an element of first transition series?

11. Fe3+ ion is more stable than Fe2+ ion because

12. Colour of transition metal ions are due to absorption of some wavelength. This result in

13. Which group contains coloured ions out of the following? 1. Cu+ 2. Ti4+ 3. Co2+ 4. Fe2+

14. The melting point of Cu, Ag and Au follow the order:

15. Which of the following pairs of ions have the same electronic configuration?

16. The melting point of copper is higher than that of zinc because:

17. Zr and Hf have almost equal atomic and ionic redii because of:

18. Which of the following is not a amphoteric ion?

19. What happens when potassium iodide reacts with acidic solution of potassium dichromate?

20. When Iron power is added in CuSO4 solution, the blue colour of solution turns:

21. Which of the following has no unpaired electrons but is coloured?

22. Transition elements are also known as:

23. Which of the following lanthanide ion is paramagnetic?

24. Lanthanoid contraction is due to increase in

25. The metal always found in free state is:

26. The best way to protect iron from rusting is:

27. In which of the following elements 4f energy level is gradually filled?

28. The element showing highest oxidation state among first transition series is:

29. The general electronic configuration of transition elements is:

30. The magnetic moment shown by the transition metal ion with the outermost electronic configuration is:

31. Transition elements are

32. Which of the following elements is liquid at room temperature:

33. Which of the following is known as red lead?

34. Which of the following is not a member of first transition elements series?

35. Which of the following has the most stable +2 oxidation state?

36. Mercuric chloride reacts with ammonia gas and form white precipitate. The molecular formula of white precipitate is:

37. When NaCI solution is added to Fe(OH)3 colloidal solution then:

38. Which metal nitrate gives colourless gas on thermal decomposition

5. Outermost configuration 3d⁶4s²k is of:

11. Fe³⁺ ion is more stable than Fe²⁺ ion because

13. Which group contains coloured ions out of the following? 1. Cu⁺ 2. Ti⁴⁺ 3. Co²⁺ 4. Fe²⁺

20. When Iron power is added in CuSO₄ solution, the blue colour of solution turns:

37. When NaCI solution is added to Fe(OH)₃ colloidal solution then: