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Identify the binary mixture(s) that can be separated into individual compounds, by differential extraction as shown in the given scheme.

Options

  1. AC ₆ H ₅ OH and C ₆ H ₅ COOH
  2. BC ₆ H ₅ COOH and C ₆ H ₅ CH ₂ OH
  3. CC ₆ H ₅ CH ₂ OH and C ₆ H ₅ OH
  4. DC ₆ H ₅ CH ₂ OH and C ₆ H ₅ CH ₂ COOH

Correct answer

B. C ₆ H ₅ COOH and C ₆ H ₅ CH ₂ OH

Step-by-step solution

(a) Both are soluble in NaOH . Hence, inseparable. (b) Only benzoic acid ( C ₆ H ₅ COOH ) is soluble in NaOH and NaHCO ₃ , while benzyl alcohol ( C ₆ H ₅ CH ₂ OH ) is not. Hence, separable. (c) Although NaOH can enable separation between benzyl alcohol ( C ₆ H ₅ CH ₂ OH ) and phenol ( C ₆ H ₅ OH ) as only the latter is soluble in NaOH . However, in NaHCO ₃ , both are insoluble. Hence, inseparable. (d) -Phenylacetic acid ( C ₆ H ₅ CH ₂ COOH ) is soluble in NaOH and NaHCO ₃ , while benzyl alcohol ( C ₆ H ₅ CH ₂ OH )

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