CBSE Class 12 The d-and f-Block with Answers Multiple Choice Questions with Answers. MCQ Questions Class 12 The d-and f-Block with Answers with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 The d-and f-Block with Answers MCQs with Answers to know their preparation level.
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MCQ Questions Class 12 The d-and f-Block with Answers - Set - 4
Question 1:
The only cations present in a slightly acidic solutions are Fe3+, Zn2+ and Cu2+. The reagent that when added in excess to this solution would identify and separate Fe3+ in one step is
(a) 2 M HCI
(b) 6 M NH3
(c) 6 M NaOH
(d) H2S gas
Correct Answer – (B)
Question 2:
To obtain silver from silver amalgam, it is heated in vessel which is made of –
(a) Cu
(b) Fe
(c) Ni
(d) Zn
Correct Answer – (B)
Question 3:
Which of the following compound is coloured?
(a) TiCl3
(b) FeCl3
(c) CoCl2
(d) All of these
Correct Answer – (D)
Question 4:
Paramagnetism is exhibited due to which one of the following reason?
(a) Presence of unpaired electrons
(b) Presence of completely filled electronic subshell
(c) By non-transition element
(d) By elements with noble gas configuration
Correct Answer – (A)
Question 5:
What is the ground state electron configuration of the Mn2+ ion?
(a) [Ar]4s1,3d5
(b) [Ar]4s2,3d3
(c) [Ar]3d5
(d) [Ar]3d4
Correct Answer – (C)
MCQ Questions Class 12 The d-and f-Block With Answers
Question 6:
The compounds containing complex oxyanion CrO42- are intensely yellow coloured because
(a) Chromium ion in CrO42 is a transition metal ion
(b) Cr and O are Π-bonded and the allowed Π → Π* transition occurs in the visible region
(c) Cr → O charge transfer is responsible for yellow colour
(d) Compounds have strong absorption at ~ 640 nm
Correct Answer – (C)
Question 7:
Which of the following compound is coloured?
(a) TiCl3
(b) FeCl3
(c) CoCl2
(d) All of these
Correct Answer – (A)
Question 8:
Which of the following radioisotopes is used as anticancerous?
(a) Na-24
(b) C-14
(c) U-235
(d) Co-60
Correct Answer – (D)
Question 9:
The colour of transition metal compound is due to
(a) complete ns subshell
(b) small size metal ions
(c) incomplete (n – 1)d-subshell
(d) absorption of light in UV region
Correct Answer – (C)
Question 10:
Which one of the following ions has same number of unpaired electrons as those present in V3+ ion?
(a) Fe3+
(b) Ni2+
(c) Mn2+
(d) Cr3+
Correct Answer – (B)
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