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By Jagdamba Singh, R. K. P. Singh, L. D. S. Yadav, I. Q. Siddiqui

The target of this publication is to supply adequate wisdom to its readers concerning the idea of complex useful CHEMISTRY

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Flask. Add few porcelain pieces to the flask to prevent bumping if mixture is in liquid state. Attach a water condenser. Heat the flask on a boiling water bath. The volatile liquid is collected in the receiver. When a little liquid is left in the distillation flask, stop the heating and disconnect the apparatus. The hot residual liquid left in the distillation flask is immediately poured into a dry watch glass. After a few minutes a solid compound is obtained which is collected. It is dried, purified and then is used for identification.

Three cases are possible by chemical method. Case I: When one of the component is acidic Take 10 g (or 10 ml) of the mixture in 250 m1 of beaker and add 25 m1 of saturated sodium bicarbonate solution. Stir the content till the effervescence stops. The resulting solution (Solution-A) may contain: (i) Solid + aqueous layer: This means that the non-acidic component is solid and acidic component is liquid. (ii) Non-aqueous layer and aqueous layer: This indicates that acidic component is solid and non-acidic component is liquid.

Treat 10 g (or 10 ml) of mixture with 25 ml saturated solution of sodium-bicarbonate in 250 ml beaker. Stir the content till the effervescence stops. Transfer the resulting solution in 150 ml of separatory funnel and separate aqueous and non-aqueous layers. ltisanisole. Aqueous layer Take it in a beaker and acidify with 1 : 1 Hel. Cool the resulting solution in an ice bath. Carboxylic acid separates as precipitate. compound-2. Example 2. Mixture of m-nitrophenol (solid, insoluble in water, soluble in ether) and benzonitrile (non-volatile liquid, insoluble in water and soluble in ether).

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