F Block Elements MCQ Questions
for CSIR UGC NET & GATE
Chapter wise Assignment-1
10 F-Block Elements MCQ Questions are given on this page. These questions have been asked in previous year exams of CSIR NET, GATE, TIFR, BARC etc. Test your knowledge by trying these simple MCQs and match your answers with the answer key provided at the bottom of the page.
Also note, you can attempt this assignment as a quiz where you can mark options, calculate your score and see which questions you attempted were correct and which were not. For doing so, go to Quiz link. To download the assignment in PDF format, click PDF.
Q1. Among the following statements, identify the
correct ones for complexes of lanthanide (III) ion.
[NET June 2011]
(A) Metal-Ligand bond is significantly ionic
(B) Complexes rarely show isomerism
(C) Coordination number is not more than 8
(D) The magnetic moments are not accounted even approximately
by spin only value for majority of lanthanides.
(a) A,
B and D
(b) A,
B and C
(c) B
and C
(d) A
and D
Q2.
Statement I:
The size of Zr and Hf are similar.
Statement
II: Size of Hf is affected by lanthanide contraction.
[NET June 2011]
(a) Statement
I and II are correct and II is the correct explanation of I.
(b) Statement
I and II are correct but II is not the correct explanation of I.
(c) Statement
I is correct and II is incorrect
(d) Statements
I and II are both incorrect.
Q3. The electronic configuration of gadalonium (Gd) is
[Xe]4f75d16s2, whereas that of Gd2+
is:
[NET June 2011]
(a) [Xe]4f55d06s2
(b) [Xe]4f65d06s2
(c) [Xe]4f65d16s1
(d) [Xe]4f75d16s0
Q4. The correct pair of ions for which only ground
states J level is populated at room temperature, is
[NET Dec 2019]
(a) Eu3+
and Sm3+
(b) Sm3+
and Ce3+
(c) Ce3+
and Eu3+
(d) Dy3+
and Ce3+
Q5. The coordination number and geometry of cerium in
[Ce(NO3)6]2- respectively are
[NET Dec 2011]
(a) 6,
octahedron
(b) 6,
trigonal prism
(c) 8,
cubic
(d) 12,
icosahedron
Q6.
Statement I:
U(VI) is more stable than Nd(VI)
Statement
II: The valance electrons in U are 5f, 6d and 7s orbitals
[NET Dec 2011]
(a) Statement
I and II are correct and II is the correct explanation of I.
(b) Statement
I and II are correct but II is not the correct explanation of I.
(c) Statement
I is correct and II is incorrect
(d) Statements
I and II are both incorrect.
Q7. The pair of lanthanides with highest third
ionization energy is
[NET June 2012]
(a) Eu,
Gd
(b) Eu,
Yb
(c) Dy,
Yb
(d) Lu,
Yb
Q8. The lanthanide (III) ion having the highest
partition coefficient between tri-n-butyl phosphate and concentrated HNO3
is:
[NET June 2012]
(a) La(III)
(b) Eu(III)
(c) Nd(III)
(d) Lu(III)
Q9. Which of the following shows highest solubility in
hot concentrated aqueous NaOH solution?
[NET Dec 2012]
(a) La(OH)3
(b) Nd(OH)3
(c) Sm(OH)3
(d) Lu(OH)3
Q10. Consider the ions Eu(III), Gd(III), Sm(III) and
Lu(III). The overserved and calculated magnetic moments are closest for the
pair
[NET Dec 2012]
(a) Gd(III)
and Lu(III)
(b) Eu(III)
and Lu(III)
(c) Sm(III)
and Gd(III)
(d) Sm(III)
and Eu(III)
Ans Key
1.a 2.a 3.d 4.d 5.d 6.b 7.b 8.d 9.d 10.a
Detailed Solutions