A carbohydrate is treated with alpha-naphthol | vedclass

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(B) This is the Molisch test,which is a sensitive chemical test for the presence of carbohydrates.In this procedure,the carbohydrate solution is mixed

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Violet

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(B) This is the Molisch test,which is a sensitive chemical test for the presence of carbohydrates.In this procedure,the carbohydrate solution is mixed with an alcoholic solution of $\alpha$-naphthol.Then,concentrated $H_{2}SO_{4}$ is added slowly along the sides of the test tube.The concentrated acid dehydrates the carbohydrates to form furfural or its derivatives.These derivatives react with $\alpha$-naphthol to produce a purple or violet-coloured ring at the junction of the two liquid layers.

$A$ carbohydrate is treated with $\alpha$-naphthol and conc. $H_{2}SO_{4}$. What colour will be formed at the junction of two liquids?

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