10 F-Block Elements MCQ Questions are given on this page. These questions have been asked in previous year exams ofCSIR NET, GATE, TIFR, BARCetc. 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 strongest reducing ion of the following is
[GATE 2001]
(a) U3+
(b) Am3+
(c) Cm3+
(d) Cf3+
Q2 The lanthanide complex that do not have square
antiprismatic structure is (acac = acetylacetonate; phen=1,10-phenanthroline)
[GATE 2005]
(a) [Ce(NO3)6]2-
(b) [La(acac)3(H2O)2]
(c) [Ce(acac)4]
(d) [Eu(acac)3(phen)]
Q3 The metal ion that is expected to shift the C1-methylene
group in heptanol from 2 to 10 ppm in 1H NMR is
[GATE 2006]
(a) Eu(III)
(b) Tl(III)
(c) Al(III)
(d) Sc(III)
Q4 The difference in the measured and calculated
magnetic moments (based on spin-orbit coupling) is observed for
[GATE 2007]
(a) Pm3+
(b) Eu3+
(c) Dy3+
(d) Lu3+
Q5 The separation of trivalent lanthanide ions, Lu3+,
Yb3+, Dy3+, Eu3+, can be effectively done by a
cation exchange resin using ammonia o-hydroxy isobutyrate as the event the
order in which the ions will be separated is
[GATE 2007]
(a) Lu3+,
Yb3+, Dy3+, Eu3+
(b) Eu3+,
Dy3+, Yb3+, Lu3+
(c) Dy3+,
Yb3+, Eu3+, Lu3+
(d) Yb3+,
Dy3+, Lu3+, Eu3+
Q6 The calculated and observed magnetic moments
differ considerably for an Aqua complex of Lanthanide (III) ion as a result of
low-lying states of high J. The ion, among the following is
[GATE 2016]
(a) Ce3+
(b) Pr3+
(c) Eu3+
(d) Yb3+
Q7 The lanthanide ion that exhibits colour in its'
aqueous solution is
[GATE 2017]
(a) La(III)
(b) Eu(III)
(c) Gd(III)
(d) Lu(III)
Q8 Generally, the coordination number and the nature
of the electronic absorption band (f-f transition) of lanthanide (III) ion in
their complexes are, respectively
[GATE 2018]
(a) greater
than 6 and sharp
(b) 6
and broad
(c) less
than 6 and sharp
(d) greater
than 6 and broad
Q9 Which of the following dipositive lanthanide ion
is most stable
(a) Ce2+
(b) Eu2+
(c) Gd2+
(d) Ho2+
Q10 The increasing order of basic character of
hydroxides of Ln3+ ions is
(a) La(OH)3,
Nd(OH)3, Pr(OH)3, Gd(OH)3
(b) Gd(OH)3,
Nd(OH)3, Pr(OH)3, La(OH)3
(c) Nd(OH)3,
Pr(OH)3, Gd(OH)3, La(OH)3
(d) Gd(OH)3,
Nd(OH)3, La(OH)3, Pr(OH)3
Ans Key
1.a 2.a 3.a 4.b 5.a 6.c 7.b 8.a 9.b 10.b
Detailed Solutions
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