Which reagent is used to test for the presence of phenol?
Phenols give a violet coloration with neutral FeCl ₃, which is a characteristic test for their presence. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.
Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII), Chapter: Coordination Compounds and d Block Elements (Latest NCERT 2026-27), Topic: Colour of [Ti(H₂O)₆]³⁺, crystal field theory and d-d transition