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Q1. The
metal ion which is most likely to show the low spin-high spin equilibria in its
complexes has the electronic configuration
(a) d3
(b) d4
(c) d6
(d) d8
Q2. The magnetic susceptibility
of a paramagnetic substance
(a) is independent of temperature
(b) attains the maximum value at
Neel temperature
(c) increases gradually with
decrease in temperature followed by a steep rise after Curie temperature
(d) increases with decrease of
temperature
Q3. The effective magnetic moment
is maximum for K4Mn(CN)6
(a) K4Mn(CN)6
(b) K2MnO4
(c) K2MnCl4
(d) KMnO4
Q4. The complex with spin only
magnetic moment of ~4.9 BM is:
(a) [Fe(H2O)6]2+
(b) [Fe(CN)6]3-
(c) [Fe(CN)6]4-
(d) [Fe(H2O)6]3+
Q5. The magnetic moment of an
octahedral Co(II) complex is 4.0 uB. The d-electron configuration of Co(II) is:
[GATE
2003]
(a) t2g4 eg3
(b) t2g5
eg2
(c) t2g6
eg1
(d) t2g3
eg4
Q6. The zero magnetic moment of octahedral
K2NiF6 is due to
[GATE
2004]
(a) low
spin d6 Ni(IV) complex
(b) Low
spin d8 Ni(II) complex
(c) High
spin d8 Ni(II) complex
(d) High spin d6 Ni(IV) complex
Q7. In tetrahedral geometry,
which one of the following sets of electronic-configuration will have orbital
contribution to the magnetic moment?
[GATE
2004]
(a) d3,
d4, d8, d9
(b) d1,
d6, d7, d9
(c) d3,
d4, d7, d9
(d) d1,
d3, d4, d9
Q8. The experimental magnetic moment of K3[Fe(CN)6] is 2.3 μB and is attributed o the
[GATE
2006]
(a) spin only value of a low-spin Fe
(b) spin
only value of a high-spin Fe
(c) low-spin
Fe with orbital contribution
(d) high-spin
Fe with orbital contribution
Q9. Which of the following is
diamagnetic in nature
(a) Hg[Co(NCS)4]
(b) K3[Fe(CN)6]
(c) K2PtCl4
(d) [Cu(OAc)4(H2O)2]
Q10. [Ni(CN)4]2- and [NiCl4]2- are
(a) both
diamagnetic
(b) both
paramagnetic
(c) diamagnetic
and paramagnetic respectively
(d) antiferromagnetic
and diamagnetic respectively
Q11. The plots of xT versus
T (where x is molar magnetic susceptibility and T is the temperature)
for a paramagnetic complex which strictly follows Curie equation is:
[GATE
2012]
(a) 
(b) 
(c) 
(d) 
Q12. The actual magnetic moment
shows a large deviation from the spin-only formula in case of
[NET
Dec 2011]
(a) Ti3+
(b) V3+
(c) Gd3+
(d) Sm3+
Q13. The plot of xT versus
T data of an ideal paramagnetic sample will
(a) pass
through origin
(b) be
parallel to T axis
(c) be
parallel to xT axis
(d) parabolic
nature
Q14. The species with highest magnetic
moment (spin only value is)
(a) VCl64-
(b) (n5-C5H5)2Cr
(c) [Co(NO2)6]3-
(d) [Ni(EDTA)]2-
Q15. The magnetic property of
Hg[Co(NCS)4] at 25º C is:
(a) diamagnetic
(b) paramagnetic
(c) ferromagnetic
(d) antiferromagnetic
Q16. Which of the following complexes
has the highest magnetic moment?
(a) [Fe(CN)6]4-
(b) [VO(H2O)5]2+
(c) [Cr(NH3)6]3+
(d) [Co(NH3)6]3+
Answer Key
Q1.c Q2.d Q3.c Q4.a Q5.b
Q6.a Q7.a Q8.c Q9.c Q10.c
Q11.c Q12.d Q13.b Q14.a Q15.b Q16.c
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