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Salt Analysis question

2021 · Shift 2 · Q16

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JEE Advanced
Chemistry
Salt Analysis
2021 · Shift 2 · Q16

Salt Analysis question

2021 · Shift 2 · Q16

JEE AdvancedChemistrySalt AnalysisMCQ+3 / −1

The reaction of

K_3[Fe(CN)_6]

with freshly prepared

FeSO_4

solution produces a dark blue precipitate called Turnbull's blue. Reaction of

K_4[Fe(CN)_6]

with the

FeSO_4

solution in complete absence of air produces a white precipitate X, which turns blue in air. Mixing the

FeSO_4

solution with

NaNO_3

, followed by a slow addition of concentrated

H_2SO_4

through the side of the test tube produces a brown ring.Among the following, the brown ring is due to the formation of

A
$[Fe(NO)_2](SO_4)_2]^{2-}$
B
$[Fe(NO)_2](H_2O)_4]^{3+}$
C
$[Fe(NO)_4](SO_4)_2]$
D
$[Fe(NO)(H_2O)_5]^{2+}$

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