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Chemistry
The set having ions which are coloured and paramagnetic both is -
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Q. The set having ions which are coloured and paramagnetic both is -
JEE Main
JEE Main 2021
The d-and f-Block Elements
A
$Cu ^{2+}, Cr ^{3+}, Sc ^{+}$
46%
B
$Cu ^{2+}, Zn ^{2+}, Mn ^{4+}$
25%
C
$S c^{3+}, V^{5+}, T i^{4+}$
19%
D
$N i^{2+}, M n^{7+}, H g^{2+}$
10%
Solution:
$ Cu ^{2+}:[ Ar ] 3 d^{9} 4 s^{0} $
$ Cr ^{3+}:[ Ar ] 3 d^{3} 4 s^{0} $
$ Sc ^{+}:[ Ar ] 3 d^{1} 4 s^{1}$
All are coloured and paramagnetic due to presence