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How will you prepare Lassaigne's extract...

How will you prepare Lassaigne's extract?

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Lassagine.s extract preparation:
(i) A small piece of Na dried by pressing between the folds of filter paper is taken in a fusion tube and it is gently heated. When it melts to a shining globule, a pinch of organic compound is added.
(ii) The tube is heated till reaction ceases and become red hot. Then it is plunged in 50 ml of distilled water taken in a china dish and the bottom of the tube is broken by striking it against the dish.
(iii) The contents of the dish is boiled for 10 minutes and then it is filtered. The filtrate is known as Lassaigne.s extract.
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