MDCAT Chemistry MCQ #8

A technician performs the Lucas test on a sample of 2-propanol. What observation would confirm the presence of this secondary alcohol in the lab?

MDCAT Chemistry MCQ #8

  1. Question 1

    Q1. A technician performs the Lucas test on a sample of 2-propanol. What observation would confirm the presence of this secondary alcohol in the lab?

    • A) Immediate oil layer formation
    • B) Oil layer formation after 5-10 minutes
    • C) Oil layer formation only on heating
    • D) No reaction regardless of temperature

    Answer: Oil layer formation after 5-10 minutes

    Explanation: The Lucas reagent (HCl/ZnCl2) reacts with secondary alcohols like 2-propanol to form an oily layer within 5-10 minutes. Primary alcohols require heating.