Which one of the following reactions does NOT belong to "Lassaigne's test"?
Qualitative analysis: detection of N, S, P, halogens
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NEET UG 2025 question paper (official, booklet 45)
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In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with Fe\(^{3+}\) due to the formation of -