Chemistry · 2021
JEE Main · 3 August 2021, Shift 2 · Q40
The oxidation states of Fe in [ Fe ( NCS )( NH_3)_5] SO_4, Na_3[ Fe ( S_2 O_3)_3] and [ Fe ( CO )_5] respectively are
The oxidation states of Fe in $\displaystyle \left[\mathrm{Fe}(\mathrm{NCS})\left(\mathrm{NH}_3\right)_5\right] \mathrm{SO}_4, \mathrm{Na}_3\left[\mathrm{Fe}\left(\mathrm{S}_2 \mathrm{O}_3\right)_3\right]$ and $\displaystyle \left[\mathrm{Fe}(\mathrm{CO})_5\right]$ respectively are
Official answer
(2)
$\displaystyle 3$, $\displaystyle 3$ and $\displaystyle 0$
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JEE Main 2021 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.