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NEETChemistryAlcohols Phenols and Ethers

Match List-I with List-II. List-I (Alcohol) List-II (Observation with Lucas Reagent) (A) 2-Methylpropan-2-ol (I) No turbidity at room temperature (B) Propan-2-ol (II) Turbidity appears in about 5 minutes (C) Ethanol (III) Turbidity appears immediately Choose the correct answer from the options given below:

Options

  1. A(A)-(I), (B)-(II), (C)-(III)
  2. B(A)-(II), (B)-(III), (C)-(I)
  3. C(A)-(III), (B)-(II), (C)-(I)
  4. D(A)-(III), (B)-(I), (C)-(II)

Correct answer

C. (A)-(III), (B)-(II), (C)-(I)

Step-by-step solution

2-Methylpropan-2-ol is a tertiary alcohol. Tertiary alcohols react fastest with Lucas reagent (anhydrous ZnCl ₂ and conc. HCl ) to form alkyl chlorides, producing turbidity immediately. Propan-2-ol is a secondary alcohol. It reacts slower and produces turbidity in about 5 minutes. Ethanol is a primary alcohol. Primary alcohols do not react with Lucas reagent at room temperature, hence no turbidity is observed. Therefore, the correct match is (A)-(III), (B)-(II), (C)-(I). Answer: (A)-(III), (B)-(II), (C)-(I)

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