Among the following ions which one has the highest paramagnetism - Vidyadip

MCQ

Among the following ions which one has the highest paramagnetism

A
${\left[ {Cr{{({H_2}O)}_6}} \right]^{3 + }}$
✓
${\left[ {Fe{{({H_2}O)}_6}} \right]^{2 + }}$
C
${\left[ {Cu{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }}$
D
${\left[ {Zn{{\left( {{H_2}O} \right)}_6}} \right]^{2 + }}$

✓

Answer

Correct option: B.

${\left[ {Fe{{({H_2}O)}_6}} \right]^{2 + }}$

b
(b) ${[Fe{({H_2}O)_6}]^{2 + }}$ has four unpaired electrons, ${[Cr{({H_2}O)_6}]^{3 + }},$${[Cu{({H_2}O)_6}]^{2 + }}$ and ${[Zn{({H_2}O)_6}]^{2 + }}$ have $3, 1, 0$ unpaired electrons respectively.

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