Q. Trichloroacetaldehyde, CCl₃CHO reacts with chlorobenzene in presence of sulphuric acid and produces:
A) (p-Cl–C₆H₄)₃CH
B) (p-Cl–C₆H₄)₂C(OH)Cl
C) (p-Cl–C₆H₄)₂CH–CCl₃
D) (p-Cl–C₆H₄)₂C(Cl)–CH₂Cl
Explanation
[Solution from source] In conc. H₂SO₄, chloral condenses with two molecules of chlorobenzene at their para positions, losing water, to give DDT: (p-Cl–C₆H₄)₂CH–CCl₃. The CCl₃ group stays intact; it is not replaced by a third ring. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.