Apentix/AP Biology/Unit 1: Chemistry of Life/Question

AP Biologymediummcq1 pt

Which solute can accept a hydrogen bond from water even though the solute has no O–H or N–H bond of its own?

A.Acetone, whose carbonyl oxygen has lone-pair electrons

B.Methane, which contains only C–H bonds

C.Ethane, a nonpolar hydrocarbon containing C–C and C–H bonds

D.Molecular oxygen, a small nonpolar diatomic molecule

Explanation

Core Concept

A solute does not need its own O–H or N–H bond to hydrogen-bond with water. A carbonyl oxygen can act as a hydrogen-bond acceptor while water supplies the partially positive hydrogen.

Correct Answer

AAcetone, whose carbonyl oxygen has lone-pair electrons

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