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Chemical Bonding — Test Answers

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21
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When applied to a dish, soap makes grease soluble in water. Which explanation correctly supports the role of intermolecular forces in this common observation?

A
The nonpolar end of a soap molecule attaches itself to grease.
B
The nonpolar end of a soap molecule attaches itself to water.
C
The polar soap molecule attaches itself to a nonpolar soap molecule.
D
The polar soap molecule attaches itself to the dish.
22
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Which statement describes how the binary ionic compound KBr is named?

A
The metal is named first, and the name is unchanged.
B
The metal is named second, and the name is unchanged.
C
The nonmetal is named second, and the name is unchanged.
D
The nonmetal is named first, and the name is unchanged.
23

Among the intermolecular forces, which forces are typically the weakest?

A
dipole-dipole interactions
B
dipole-induced dipole interactions
C
hydrogen bonds
D
London dispersion forces
24

Which reason best explains why metals are shiny?

A
because their valence electrons absorb light
B
because their valence electrons move to higher energy levels
C
because their valence electrons oscillate between bands
D
because their valence electrons reflect light
25

Which of the compounds would be expected to have the strongest ionic bonds?

A
the compound that has the largest ions with the least charge
B
the compound that has the largest ions with the greatest charge
C
the compound that has the smallest ions with the greatest charge
D
the compound that has the smallest ions with the least charge

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