Which of the following statements is correct?

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(A) The Hinsberg reagent is benzene sulfonyl chloride $(C_6H_5SO_2Cl)$.It reacts with $1^o$ amines to form a sulfonamide which is soluble in alkali.It

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Hinsberg reagent can be used to separate $1^o, 2^o$ and $3^o$ amines.

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(A) The Hinsberg reagent is benzene sulfonyl chloride $(C_6H_5SO_2Cl)$.It reacts with $1^o$ amines to form a sulfonamide which is soluble in alkali.It reacts with $2^o$ amines to form a sulfonamide which is insoluble in alkali.It does not react with $3^o$ amines.Thus,it is used to distinguish and separate $1^o, 2^o$ and $3^o$ amines.Regarding volatility,$1^o$ amines have two $H$-atoms,$2^o$ have one,and $3^o$ have none,leading to intermolecular hydrogen bonding strength $1^o > 2^o > 3^o$,which makes $3^o$ amines more volatile. Thus,the order of volatility is $3^o > 2^o > 1^o$.

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