22. Which of the following statements about Lucas test is correct? (A) The reagent composed of HCl and ZnI₂ (B) Tertiary alcohols react faster than primary alcohol (C) Primary alcohols react by the Sᴺ1 mechanism (D) Primary alcohols react faster than tertiary alcohols. (E) Tertiary alcohols react by the Sᴺ2 mechanism.

47. When an ¹⁸O-labelled ester is treated with NaOH in H₂O, carboxylic acid and alcohol are isolated. Which of the following statements is true? (¹⁸O-ester + OH⁻/H₂O → R-COOH + R’-OH) (A) ¹⁸O remains in both oxygen atoms of the carboxylic acid. (B) The solvent water should contain ¹⁸O. (C) ¹⁸O remains in the carbonyl oxygen only. (D) ¹⁸O remains in alcohol only. (E) ¹⁸O is found in both the carboxylic acid and the alcohol.

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