Q.

An organic compound "A" on treatment with benzene sulphonyl chloride gives compound B. B is soluble in dil. NaOH solution. Compound A is :

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a

C6H5–N(CH3 )2

b

C6H5–NHCH2CH3

c

C6H5–CH2 NHCH3

d

C6 H5 –CH(CH3)–NH2

answer is D.

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Detailed Solution

In simple words the compound must be primary amine since it reacts with Hiensberg reagent as well as base added and forms a soluble salt, secondary amine only react with Hiensberg reagent not with base, and tertiary amines react with with none.
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An organic compound "A" on treatment with benzene sulphonyl chloride gives compound B. B is soluble in dil. NaOH solution. Compound A is :