Chapter 8 Quiz

Which of the following results would you expect when you conduct an experiment to determine the attractions between nonpolar mineral oil molecules?

• A stream of mineral oil will be attracted to a charged wand and mineral oil will spread out on wax paper.

• A stream of mineral oil will be repelled by a charged wand and mineral oil will spread out on wax paper.

• A stream of mineral oil will not be attracted to a charged wand and mineral oil will spread out on wax paper.

• A stream of mineral oil will not be attracted to a charged wand and mineral oil will bead up wax paper.

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Lesson 42

Which of the following results would you expect when you conduct an experiment to determine the attractions between nonpolar paint thinner molecules?

• A stream of paint thinner will not be attracted to a charged wand and paint thinner will spread out on wax paper.

• A stream of paint thinner will not be attracted to a charged wand and paint thinner will bead up wax paper.

• A stream of paint thinner will be attracted to a charged wand and paint thinner will spread out on wax paper.

• A stream of paint thinner will be repelled by a charged wand and paint thinner will spread out on wax paper.

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Lesson 42

Motor oil does not dissolve easily in water. Which is the correct explanation for this?

• a. Motor oil is polar and water is nonpolar, so the molecules are attracted to each other.

• Motor oil is polar and water is nonpolar, so the molecules are not attracted to each other.

• Motor oil is nonpolar and water is polar, so the molecules are not attracted to each other.

• Motor oil is nonpolar and water is polar, so the molecules are attracted to each other.

Methanol dissolves easily in water. Which is the correct explanation for this?

• Methanol is polar and water is polar, so the molecules are attracted to each other.

• Methanol is polar and water is polar, so the molecules are not attracted to each other.

• Methanol is nonpolar and water is polar, so the molecules are not attracted to each other.

• Methanol is nonpolar and water is polar, so the molecules are attracted to each other.

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NGSS.HS-PS1-1

Which of the following is true about water molecules?

• The partial negative charge is on the hydrogen atoms and there is a strong intermolecular force between the water molecules.

• The partial negative charge is on the oxygen atom and there is a weak intermolecular force between the water molecules.

• The partial negative charge is on the hydrogen atoms and there is a weak intermolecular force between the water molecules.

• The partial negative charge is on the oxygen atom and there is a strong intermolecular force between the water molecules.

Which of these statements correctly refers to the smell of a carbon dioxide molecule?

• It has a smell because it fits into a flat receptor site.

• It has a smell because it is a polar molecule.

• It does not smell because it does not reach the nose.

• It has no smell because it is nonpolar.

If the polar bears represent atoms and the ice cream scoops represent electrons, what type of bond is represented in the illustration below?

• nonpolar covalent

• polar covalent

• ionic

• nonpolar ionic

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Lesson 43

Which of these is most likely to smell?

• small polar molecules

• small nonpolar molecules

• large molecules

• metal ions

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Lesson 45

The Lewis dot structure of formaldehyde is shown. Which statement does the structure support?

• Formaldehyde has a smell because it is a small nonpolar molecule.

• Formaldehyde does not have a smell because it is a small nonpolar molecule.

• Formaldehyde has a smell because it is a small ionic molecule.

• Formaldehyde has a smell because it is a small polar molecule.

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Lesson 45

Which of the following combinations will result in the least polar bond?

• P – S

• Mg – O

• N – F

• Al – N

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Lesson 44