In Lassaigne's test a violet colour obtained indicates the presence of

In Lassaigne’s test a violet colour obtained indicates the presence of

In Lassaigne’s test a violet colour obtained indicates the presence of

(a) nitrogen
(b) sulphur
(c) halogen
(d) none of the above

sulphur

S + 2Na → Na₂S. Na₂S + Na₂[Fe(NO)(CN)₅] (Sodium nitroprusside) → Na₄[Fe(CN)₅NOS] (violet or purple colour).

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