In acidic medium \( \mathrm{H}_{2} \mathrm{~S} \) does not give reaction with \( \mathrm{Na}_{2}...

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In acidic medium \( \mathrm{H}_{2} \mathrm{~S} \) does not give reaction with \( \mathrm{Na}_{2}\left[\mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NO}\right] \) why?
\( \mathrm{P} \)
(1) Conc. of \( \mathrm{S}^{2-} \) ion increases
W
(2) Conc. of \( \mathrm{S}^{2-} \) ion decreases
(3) Remain same
(4) None of these
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