See image — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

# Separating Enantiomers from a Racemic Mixture **Step 1: Understand what we're separating** A racemic mixture contains equal amounts of d- and l-enantiomers (optical isomers) — molecules that are non-superimposable mirror images of each other. **Step 2: Identify the correct term** The process of separating d and l enantiomers from a racemic mixture is called **Resolution**. **Step 3: Evaluate other options** - **(2) Dehydration**: Removal of water from molecules (e.g., $C_2H_5OH \rightarrow C_2H_4 + H_2O$) — not related to enantiomer separation - **(3) Rotation**: Refers to optical rotation (ability of enantiomers to rotate polarized light), not their separation - **(4) Dehydrohalogenation**: Removal of hydrogen halide ($HX$) from alkyl halides — an elimination reaction, unrelated to enantiomer separation **Step 4: Why resolution works** Resolution typically involves: - Reacting the racemic mixture with a chiral reagent (e.g., optically pure acid or base) - Forming diastereomeric salts/derivatives with different physical properties - Separating by crystallization or other physical methods - Regenerating pure enantiomers **Answer: (1) Resolution** ✓