Question 1
Question detail
How do permanent dipole-dipole forces affect the boiling point of a substance?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Bonding
Question
- A. They decrease the boiling point.
- B. They have no effect on the boiling point.
- C. They increase the boiling point.
- D. They only affect the melting point.
Answer
They increase the boiling point.
Explanation
Permanent dipole-dipole forces increase the boiling point of a substance because more energy is required to overcome these attractive forces between polar molecules during the phase change from liquid to gas.
Common mistake
Confusing Dipole-Dipole Forces with Other Intermolecular Forces
Students often confuse permanent dipole-dipole forces with London dispersion forces, failing to recognize that dipole-dipole forces occur between polar molecules due to their permanent dipoles.
To clarify, remember that permanent dipole-dipole forces arise from the attraction between the positive end of one polar molecule and the negative end of another. Review the characteristics of polar molecules and how their dipoles interact.
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