The d-and f-Block-5
Chemistry Class 12 Science

MCQ Questions Class 12 The d-and f-Block With Answers

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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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Students who are searching for NCERT MCQ Questions for Class 12 The d-and f-Block with Answers with Answers are compiled here to get good practice on all fundamentals. Know your preparation level on MCQ Questions for Class 12 The d-and f-Block with Answers with Answers. You can also verify your answers from our provided MCQ Class 12 The d-and f-Block with Answers with Answers. So, ace up your preparation with MCQ of Class 12 Chemistry Examinations.

MCQ Questions Class 12 The d-and f-Block with Answers - Set - 5

Question 1: 

Which of the following ions has electronic configuration [Ar]3d6?
(a) Ni3+
(b) Mn3+
(c) Fe3+
(d) Co3+

Correct Answer – (D)

Question 2: 

Consider the following statements 
(I) La(OH)3 is the least basic among hydroxides of lanthanides.
(II) Zr4+ and Hf4+ posses almost the same ionic radii.
(III) Ce4+ can as an oxidizing agent.
Which of the above is/are true ?
(a) (I) and (III)
(b) (II) and (III)
(c) (II) only
(d) (I) and (II)

Correct Answer – (B)

Question 3: 

A compound of a metal ion Mx+ (Z = 24) has a spin only magnetic moment of 15 Bohr Magnetons. The number of unpaired electrons in the compound are 
(a) 2
(b) 4
(c) 5
(d) 3

Correct Answer – (D)

Question 4: 

In which of the following cases, the stability of two oxidation states is correctly represented
(a) Ti3+ > Ti4+
(b) Mn2+ > Mn3+
(c) Fe2+ > Fe3+
(d) Cu+ > Cu2+

Correct Answer – (B)

Question 5: 

Which one of the following statements concerning lanthanide elements is false? 
(a) Lanthanides are separated from one another by ion exchange method
(b) The ionic radii of trivalent lanthanides steadily increase with increase in atomic number
(c) All lanthanides are highly dense metals
(d) Most characteristic oxidation state of lanthanides is +3

Correct Answer – (B)

MCQ Questions Class 12 The d-and f-Block With Answers

Question 6: 

For d-block elements the first ionization potential is of the order 
(a) Zn > Fe > Cu > Cr
(b) Sc = Ti < V = Cr
(c) Zn < Cu < Ni < Co
(d) V > Cr > Mn > Fe

Correct Answer – (A)

Question 7: 

Identify the incorrect statement among the following : 
(a) Lanthanoid contraction is the accumulation of successive shrinkages.
(b) As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements.
(c) Shielding power of 4f electrons is quite weak.
(d) There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu.

Correct Answer – (B)

Question 8: 

Cuprous ion is colourless while cupric ion is coloured because 
(a) Both have half filled p-and d-orbitals
(b) Cuprous ion has incomplete d-orbitaland cupric ion has a complete d-orbital
(c) Both have unpaired electrons in the d-orbitals
(d) Cuprous ion has complete d-orbital and cupric ion has an incomplete d-orbital.

Correct Answer – (D)

Question 9: 

White silver surface turns black when O3 is passed over it. This is due to the formation of
(a) silver hydroxide 
(b) freshly reduced silver which is black in colour
(c) silver oxide
(d) a complex compound of silver and ozone

Correct Answer – (B)

Question 10: 

The colour of copper sulphide is 
(a) Blue
(b) Black
(c) Red
(d) Green

Correct Answer – (B)
MCQ Questions Class 12 The d-and f-Block With Answers
Set 1
Set 2
Set 3
Set 4
Set 5

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