GRE Subject Test: Biochemistry, Cell, and Molecular Biology : Help with Intermolecular Forces

Study concepts, example questions & explanations for GRE Subject Test: Biochemistry, Cell, and Molecular Biology

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All GRE Subject Test: Biochemistry, Cell, and Molecular Biology Resources

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Example Questions

Example Question #1 : Help With Intermolecular Forces

Which of the following forces is strongest between molecules of hydrochloric acid (HCl)?

Possible Answers:

Ionic bonding

Dipole-dipole interactions

Hydrogen bonding

London dispersion forces

Correct answer:

Dipole-dipole interactions

Explanation:

Since hydrochloric acid has a partial positive charge on the hydrogen and a partial negative charge on the chlorine, the molecules will have dipole-dipole interactions between them. Although hydrogen bonding is a stronger force, a hydrogen must be attached to a nitrogen, oxygen, or fluorine in order to exhibit hydrogen bonding.

Example Question #2 : Help With Intermolecular Forces

Which of the following molecules is not capable of hydrogen bonding?

Possible Answers:

Acetic acid

Ethanol

Correct answer:

Explanation:

Hydrogen bonding is possible when a hydrogen atom is attached to a nitrogen, oxygen, or fluorine. Of the following options, hydrochloric acid  is the only option that does not fit the criteria.

All GRE Subject Test: Biochemistry, Cell, and Molecular Biology Resources

1 Diagnostic Test 201 Practice Tests Question of the Day Flashcards Learn by Concept
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