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  4. Which of the following is used as Hinsberg’s reagent?

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Q. Which of the following is used as Hinsberg’s reagent?

Amines

Solution:

Hinsberg's reagent is used to differentiate the amines into $1^{0}$ or $2^{0}$ or $3^{0}$.
The chemical formula for Hinsberg reagent is $C _{6} H _{5} SO _{2} Cl$ i.e Benzene sulphonyl chloride.
Primary amines get converted to sulphonamide in presence of Hinsberg reagent which is soluble in $NaOH$
secondary amines get converted to sulphonamide in presence of Hinsberg reagent which is insoluble in $NaOH$
There is no reaction of Hinsberg reagent with tertiary amines.