5
lesson pretestMultiple Choice

Pretest

Question 5 • CMS 2026-2027 Biology CREDIT RECOVERY

Which statement explains why hydrogen bonds are able to form between water molecules?

Answer
A
Water molecules are polar.
B
Water molecules are large.
C
Water molecules show adhesion.
D
Water molecule atoms have weak atomic bonds.

Explanation

Water molecules are polar: oxygen carries a slight negative charge, while the hydrogen atoms carry slight positive charges. The positive hydrogen of one water molecule is attracted to the negative oxygen of another, forming a hydrogen bond. Being large or having weak atomic bonds does not explain this attraction; adhesion is a result of attractions between different substances, not the reason water molecules hydrogen-bond to each other.

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