JEE Main202624 January 2026Evening ShiftChemistryAminesActual
Given below are two statements: Statement I : The dipole moment of R-CN is greater than R-NC and R-NC can undergo hydrolysis under acidic medium to produce . Statement II : R-CN hydrolyses under acidic medium to produce a compound which on treatment with SOCl ₂ , followed by the addition of NH ₃ gives another compound ( x ) . This compound ( x ) on treatment with NaOCl / NaOH gives a product, that on treatment with C
Options
- ABoth Statement I and Statement II are false
- BStatement I is false but Statement II is true
- CBoth Statement I and Statement II are true
- DStatement I is true but Statement II is false
Correct answer
B. Statement I is false but Statement II is true
Step-by-step solution
Statement I: The dipole moment of alkyl cyanides ( R-CN ) is indeed greater than alkyl isocyanides ( R-NC ) because the C N bond is more polar than the N^+ C^- bond where formal charges oppose the electronegativity difference. However, the acidic hydrolysis of R-NC produces a primary amine ( R-NH₂ ) and formic acid ( HCOOH ), not a carboxylic acid ( R-COOH ). Thus, Statement I is false. Statement II: R-CN on acidic hydrolysis gives R-COOH . Treatment with SOCl₂ gives R-COCl . Addition of NH₃ gives R-CONH₂ (compound