Coordination Compounds 2 Question 45

####47. Among the following ions, which one has the highest paramagnetism?

(a) $\left[Cr\left(H _2 O\right) _6\right]^{3+}$

(b) $\left[Fe\left(H _2 O\right) _6\right]^{2+}$

(c) $\left[Cu\left(H _2 O\right) _6\right]^{2+}$

(d) $\left[Zn\left(H _2 O\right) _6\right]^{2+}$

(1993, 1M)

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Solution:

  1. $Fe$ in $\left[Fe\left(H _2 O\right) _6\right]^{2+}$ has maximum (four) unpaired electrons, has highest paramagnetism.


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