Qualitative Analysis - Result Question 19
####19. The brown ring complex compound is formulated as $\left[Fe\left(H _2 O\right) _5(NO)^{+}\right] SO _4$. The oxidation state of iron is
(a) 1
(b) 2
(c) 3
(d) 0
(1987, 1M)
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Solution:
- The total positive valency is +2 (because the only anion is $SO _4^{2-}$ ). Therefore, oxidation state of $Fe$ must be +1 .
