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(C) Primary and secondary amines can be distinguished using the $Hinsberg$ reagent ($benzenesulfonyl$ $chloride$,$C_6H_5SO_2Cl$).$1.$ Primary amines r

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Hinsberg reagent

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(C) Primary and secondary amines can be distinguished using the $Hinsberg$ reagent ($benzenesulfonyl$ $chloride$,$C_6H_5SO_2Cl$).$1.$ Primary amines react with $Hinsberg$ reagent to form $N$-alkylbenzenesulfonamide,which is soluble in alkali due to the presence of an acidic hydrogen atom on the nitrogen.$2.$ Secondary amines react with $Hinsberg$ reagent to form $N,N$-dialkylbenzenesulfonamide,which is insoluble in alkali because it lacks an acidic hydrogen atom on the nitrogen.$3.$ Tertiary amines do not react with $Hinsberg$ reagent.Therefore,the $Hinsberg$ reagent is the correct method for distinguishing between primary and secondary amines.

Primary and secondary amines can be distinguished by

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