p-toluenesulphonyl chloride is known as Hinsb | vedclass

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Question

(C) $p$-toluenesulphonyl chloride $(CH_3C_6H_4SO_2Cl)$ is commonly known as Hinsberg's reagent.It is used to distinguish between primary $(1^{\circ})$

Vedclass · Accepted Answer

On treatment with a secondary amine,it leads to a product that is soluble in alkali.

Vedclass · Answer

(C) $p$-toluenesulphonyl chloride $(CH_3C_6H_4SO_2Cl)$ is commonly known as Hinsberg's reagent.It is used to distinguish between primary $(1^{\circ})$,secondary $(2^{\circ})$,and tertiary $(3^{\circ})$ amines.$1$. Primary amines react with Hinsberg's reagent to form $N$-alkylbenzenesulphonamide,which contains an acidic hydrogen atom attached to the nitrogen,making it soluble in alkali.$2$. Secondary amines react with Hinsberg's reagent to form $N,N$-dialkylbenzenesulphonamide. This product does not contain any acidic hydrogen atom attached to the nitrogen,so it is insoluble in alkali.$3$. Tertiary amines do not react with Hinsberg's reagent because they lack an acidic hydrogen atom.Therefore,the statement that the product formed with a secondary amine is soluble in alkali is incorrect.

$Test/Method$	$Reagent$
$(i)$ Lucas Test	$(a)$ $C_6H_5SO_2Cl/aq. KOH$
$(ii)$ Dumas method	$(b)$ $HNO_3/AgNO_3$
$(iii)$ Kjeldahl's method	$(c)$ $CuO/CO_2$
$(iv)$ Hinsberg Test	$(d)$ Conc. $HCl$ and $ZnCl_2$
	$(e)$ $H_2SO_4$

$p$-toluenesulphonyl chloride is known as Hinsberg's reagent. Which of the following statements is $NOT$ correct for it?

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The test used to distinguish between primary,secondary,and tertiary amines is:

Match the following:
$Test/Method$ $Reagent$
$(i)$ Lucas Test $(a)$ $C_6H_5SO_2Cl/aq. KOH$
$(ii)$ Dumas method $(b)$ $HNO_3/AgNO_3$
$(iii)$ Kjeldahl's method $(c)$ $CuO/CO_2$
$(iv)$ Hinsberg Test $(d)$ Conc. $HCl$ and $ZnCl_2$
$(e)$ $H_2SO_4$

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