What distinctive physical property of esters makes them widely utilized in the commercial manufacture of cosmetics and food flavorings?
Answer and explanation
Correct answer: B. They possess pleasant, sweet fruity aromas and fragrances
- Step 1: Identify physical traits of volatile esters: low molecular weight esters are volatile liquids.
- Step 2: They possess characteristic pleasant, fruity scents (e.g., pentyl ethanoate smells of banana, octyl ethanoate of orange), making them commercial ingredients in perfumes and artificial confectionery essences.
Answer
They possess pleasant, sweet fruity aromas and fragrances.
Why not the others: 'They conduct electricity efficiently in aqueous solution' is false because esters are non-electrolyte covalent compounds; 'They have exceedingly high boiling points comparable to metals' is false as they are volatile liquids with low boiling points; 'They react vigorously with water to generate effervescence' is untrue as esters are stable and insoluble.
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