1
JEE Main 2021 (Online) 16th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin system.

(Atomic numbers Ce = 58, Gd = 64 and Eu = 63)

(a) (NH4)2[Ce(NO3)6]

(b) Gd(NO3)3 and

(c) Eu(NO3)3
A
(a) < (b) < (c)
B
(b) < (a) < (c)
C
(a) < (c) < (b)
D
(c) < (a) < (b)
2
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
In which of the following order the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment?

(i) [FeF6]3$$-$$

(ii) [Co(NH3)6]3+

(iii) [NiCl4]2$$-$$

(iv) [Cu(NH3)4]2+
A
(iii) > (iv) > (ii) > (i)
B
(ii) > (iii) > (i) > (iv)
C
(i) > (iii) > (iv) > (ii)
D
(ii) > (i) > (iii) > (iv)
3
JEE Main 2021 (Online) 25th February Morning Slot
MCQ (Single Correct Answer)
+4
-1
The hybridization and magnetic nature of $${[Mn{(CN)_6}]^{4 - }}$$ and $${[Fe{(CN)_6}]^{3 - }}$$, respectively are :
A
sp3d2 and diamagnetic
B
d2sp3 and paramagnetic
C
sp3d2 and paramagnetic
D
d2sp3 and diamagnetic
4
JEE Main 2021 (Online) 24th February Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The calculated magnetic moments (spin only value) for species $${[FeC{l_4}]^{2 - }}$$, $${[Co{({C_2}{O_4})_3}]^{3 - }}$$ and $$MnO_4^{2 - }$$ respectively are :
A
5.92, 4.90 and 0 BM
B
4.90, 0 and 1.73 BM
C
5.82, 0 and 0 BM
D
4.90, 0 and 2.83 BM
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