In the nitrogen detection test, the sodium cyanide (NaCN) present in the fusion extract first reacts with ferrous sulphate to form which intermediate compound?
In Lassaigne's test, one common method for detecting the presence of sulphur involves treating the sodium fusion extract with freshly prepared sodium nitroprusside solution, which gives a characteristic:
C. Sodium thionitroprusside (a sulphur-nitroprusside complex)
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An alternative test for detecting sulphur in the sodium fusion extract involves treating it with lead acetate solution after acidifying it with acetic acid, which gives a characteristic:
In Lassaigne's test, the presence of halogens in the sodium fusion extract is detected by acidifying the extract with dilute nitric acid and then adding:
