Explain the preparation of sodium fusion extract .

1.	Explain the preparation of sodium fusion extract .
Answer» Answer :A small piece of Na dried by pressing between the folds of a filter paper is taken in a fusion tube and it is gently heated. When it melts to a shining globule, put a pinch of the organic compound on it . Heat the tube till reaction ceases andbecomes red hot.Plunge it in about 50 mL of distilled WATER taken in a china dish and BREAK the bottom OFTHE tube by striking against the dish . Boil the contents of the dishfor about 10 mts and filter . This filtrate is known as Lassaignes EXTRACT of sodium fusion extract and it used for detection of NITROGEN, sulfur and halogens present in organic compounds. `Na +ubrace(C+N)_("from organic compounds")toNaCN`

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