Question

exam lesson name: introduction to oceanography
exam number: 700793rr

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question 1 of 20 :
select the best answer for the question.

1. hydrogen bonds form ______

a. between the negatively charged oxygen of one water molecule and a positively charged hydrogen of another water molecule.
b. to hold one molecule of water together, bonding one hydrogen atom and two oxygen atoms.
c. between the positively charged oxygen of one water molecule and the negatively charged hydrogen of another water molecule
d. to hold one molecule of water together, bonding one oxygen atom and two hydrogen atoms.
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Explanation:

To solve this, we analyze each option:

• Option B and D are incorrect because the bond holding a water molecule (H₂O) together is a covalent bond (between O and H within a molecule), not a hydrogen bond.
• Option C is incorrect as oxygen in water is negatively charged (due to higher electronegativity) and hydrogen is positively charged, so the description of charges is reversed.
• Option A is correct: Hydrogen bonds form between the negatively charged oxygen of one water molecule and the positively charged hydrogen of another water molecule (intermolecular, not intramolecular like covalent bonds in a water molecule).

Answer:

A. between the negatively charged oxygen of one water molecule and a positively charged hydrogen of another water molecule.