Which of the following compounds can be detected by Molisch’s Test?

Nitro compounds

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Sugars

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Amines

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Primary alcohols

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Solution

The correct option is B
Sugars

Molisch test is used for carbohydrates. $α$ -naphthol dissolved in ethanol is known as Molisch's reagent.
For the test, concentrated sulphuric acid is added along the walls of a test tube containing a solution of sugar and the Molisch’s reagent without mixing. A positive reaction is indicated by the appearance of a purple ring at the interface of the layers.

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