8 original questions from New Regents. The worksheet, answer key, and browser practice are free.
Dipole Attractions 4 questions
Dipole Attractions
New Regents original practice • Name: ____________________ Date: __________ Show your work for written answers.
The symbols δ+ and δ− represent partial positive and partial negative charge. A polar molecule has an uneven charge distribution overall.
Question 1
Which neighboring ends of two polar molecules attract one another most directly?
- δ+ near δ+
- δ− near δ−
- δ+ near δ−
- Neutral end near neutral end only
Question 2
Explain how the shared electrons in an H–Cl bond can create a permanent dipole in an HCl molecule.
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Question 3
Two polar molecules turn so that their δ− ends are closest. What interaction is expected between those ends?
- Attraction because both are negative
- Repulsion because they have like charges
- A covalent bond must form
- Their nuclei exchange protons
Question 4
Explain the difference between the H–Cl bond in one HCl molecule and an attraction between two HCl molecules.
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Comparing Orientations in a Model 4 questions
Comparing Orientations in a Model
Use the information below to answer the questions.
A simulation places two polar molecules at equal center-to-center distances. Each molecule has one δ+ end and one δ− end. The table records which ends are nearest.
| Model | End of first molecule | End of second molecule |
|---|---|---|
| A | δ+ | δ− |
| B | δ+ | δ+ |
| C | δ− | δ− |
Question 5
Which model places opposite partial charges nearest one another?
- A
- B
- C
- All three
Question 6
Describe one change to model B that would place opposite partial charges nearest each other.
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Question 7
Which two models place like partial charges closest to each other?
- A and B
- A and C
- B and C
- No two models
Question 8
A student says all molecules in a liquid must stay in orientation A. Explain why favored attraction does not mean that every pair stays locked in that orientation.
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