Solved: CHEMISTRY Question for NEET

NEET CHEMISTRYMedium

Identify the compound that will react with Hinsberg's reagent to give a solid which dissolves in alkali.

[Structure Missing]

Hinsberg's Test: This test uses benzenesulphonyl chloride ( $C_6H_5SO_2Cl$ ), known as Hinsberg's reagent, to distinguish between primary, secondary, and tertiary amines.
Primary Amines: React with Hinsberg's reagent to form N-alkylbenzenesulphonamide. The hydrogen attached to the nitrogen in this product is strongly acidic due to the electron-withdrawing sulphonyl group. Hence, the resulting solid is soluble in aqueous alkali (like $NaOH$ or $KOH$ ).
Secondary Amines: React to form N,N-dialkylbenzenesulphonamide, which lacks an acidic hydrogen and is insoluble in alkali.
Tertiary Amines: Do not react with Hinsberg's reagent.
Conclusion: The correct compound must be a primary amine. (Note: Specific option structures are missing from the input data, but Option 1 is indicated as the correct choice).

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