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Find the number of unpaired electrons in...

Find the number of unpaired electrons in Pentaaquanitrosyliumiron(I) sulphate.

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The correct Answer is:
3

In `[Fe(H_(2)O)_(5)NO]SO_(4)`, Fe is in +1 oxidation state and having `t_(2g)^(5)e_(g)^(2)` configuration.
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