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Nitrate is confirmed by ring test. The brown colour of the ring test is due to the formation of

(a) Ferrous Nitrite
(b) $FeSO_4.NO$
(c) $FeSO_4.NO_2$
(d) Ferrous Nitrate
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Answer: $FeSO_4.NO$
$NaNO_3 + H_2SO_4 \longrightarrow NaHSO_4 + HNO_3$
$4FeSO_4 \text{(Ferrous Sulphate)} + 3H_2SO_4 + 2HNO+3 \longrightarrow 3Fe(SO_4)_3 \text{(Ferric Sulphate)} + 4H_2O + 2NO$
$FeSO_4 + NO \longrightarrow FeSO_4.NO$ (Nitroferrous Sulphate (Brown ring))
answered Jan 28, 2014 by mosymeow_1

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