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.
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Quiz PDF
Q1 The correct electronic configuration and spin only
magnetic moment of Gd3+ (atomic number 64) are
(a) [Xe]4f7
and 7.9 BM
(b) [Xe]4f7
and 8.9 BM
(c) [Xe]4f6
5d1 and 7.9 BM
(d) [Rn]5f7
and 7.9 BM
Q2 Consider following lanthanide (III) ions
[NET June 2013]
(A) Nd(III) (B) Gd(III) (C) Dy(III)
The magnetic moment closest to spin only value is for
(a) B
only
(b) A and
B only
(c) A
and C only
(d) B and C only
Q3 Identify the pairs in which the covalent radii of
elements are almost similar
[NET June 2013]
(A) Nb, Ta (B) Mo,
W (C) La, Lu (D) Sc, Y
(a) A
and B only
(b) A
and C only
(c) B
and C only
(d) A,
B and C
Q4 Pair of lanthanide ions with show significant
deviation between the experimental and calculated magnetic moments considering
contribution from the ground state only, is
[NET Dec 2019]
(Given that: µeff = g[J(J+1)]1/2
(a) Gd3+
and Lu3+
(b) Sm3+
and Tb3+
(c) Eu3+
and Tb3+
(d) Sm3+
and Eu3+
Q5 The ground state forms of Sm3+ and Eu3+
respectively, are
[NET Dec 2013]
(a) 7F0
and 6H5/2
(b) 6H5/2
and 7F0
(c) 2F5/2
and 5I4
(d) 7F6 and 2F7/2
Q6 A comparison of the valence electron configuration
of the elements Sm and Eu suggest that
[NET June 2014]
(a) Sm is
a better one electron reductant than Eu
(b) Sm is
a better one electron oxidant than Eu
(c) Facile
oxidant state is +2 for both the elements
(d) Both
these display similar redox behaviour
Q7 Hindered β-diketonates like dpmH (dpmH =
dipivaloylmethane ) are used for the separation of lanthanides because
complexes formed with dpmH can be separated by
[NET Dec 2014]
(a) Gel
permeation chromatography
(b) Gas
chromatography
(c) Gel
filtration chromatograpy
(d) Ion
exchange chromatography
Q8 Consider the following statements with respect to
uranium
[NET June 2015]
(A) UO2+ disproportionate more
easily that UO22+
(B) U3O8 is most stable oxide
of uranium
(C) Coordination number of U in [UO2(NO3)2(H2O)2].4H2O
is 6
(D) UO22+ is linear
The correct statements are,
(a) A,
B and D
(b) A,
C and D
(c) B,
C and D
(d) A,
B and C
Q9 Consider the following statements for (NH4)2[Ce(NO3)6]
[NET June 2015]
(A) Coordination number of Ce is 12
(B) (NH4)2[Ce(NO3)6]
is paramagnetic
(C) (NH4)2[Ce(NO3)6]
is an oxidizing agent
(D) Reaction of Ph3PO with (NH4)2[Ce(NO3)6]
gives a complex having coordination number 10 for Ce.
Correct statements are,
(a) A,
B and C
(b) B,
A and D
(c) B, C
and D
(d) A,
C and D
Q10 The metallic radii are abnormally high for which
of the following pairs?
[NET Dec 2015]
(a) Eu,
Yb
(b) Sm,
Tm
(c) Gd,
Lu
(d) Nd,
Ho
Ans Key
1.a 2.a 3.d 4.d 5.b 6.b 7.b 8.a 9.d 10.a
Detailed Solutions
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