The formula of the compound which gives violet colour in Lassiagne’s test for sulphur with sodium nitroprusside is

Na₄[Fe(CN)₅NOS]

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Na₃[Fe(CN)₅NOS]

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Na₂[Fe(CN)₅S]

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Na₄[Fe(CN)₄S]

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Solution

The correct option is A
Na₄[Fe(CN)₅NOS]

$N a_{2} S + N a_{2} [F e (C N)_{5} N O] \to N a_{4} [F e (C N)_{5} N O S]$

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Similar questions

N a_{4} [F e {(C N)}_{5} (N O S)]

N a_{2} S + N a_{2} [F e (C N)_{5} N O] ⟶ N a_{4} [F e (C N)_{5} N O S]

N a_{4}

[F e) C N)_{5} N O S]

F e

O . S .

F e

N a_{2} [F e (C N)_{5} N O]

N a_{4} [F e (C N)_{5} N O S]

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