MDCAT Chemistry MCQ #80

An unknown sample of 2-propanol is treated with a mixture of anhydrous ZnCl2 and concentrated HCl. What is the expected time for turbidity appearance?

MDCAT Chemistry MCQ #80

  1. Question 1

    Q1. An unknown sample of 2-propanol is treated with a mixture of anhydrous ZnCl2 and concentrated HCl. What is the expected time for turbidity appearance?

    • A) Immediate turbidity
    • B) Turbidity after 5-10 minutes
    • C) Turbidity only on heating
    • D) No turbidity at all

    Answer: Turbidity after 5-10 minutes

    Explanation: Secondary alcohols react with Lucas reagent to form an oily layer of alkyl halide within 5 to 10 minutes at room temperature.