Answers2003350 Chemistry HONORS Sem 1 - MarezIntermolecular Forces

Intermolecular Forces Answers

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In the molecule on the left, areas that have a partial negative charge are pink and areas that have a partial positive charge are blue. The molecule on the right is nonpolar. What will most likely happen when these molecules get closer?

Question illustration
A
The molecules will repel each other because of a dipole-dipole interaction.
B
The molecules will attract each other because of a dipole-dipole interaction.
C
An induced dipole will be produced in the molecule on the right.
D
An induced dipole will be produced in the molecule on the left.
2
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Which forces can be classified as intramolecular?

A
London dispersion forces
B
van der Waals forces
C
hydrogen bonds
D
covalent bonds
3

Which of the following most likely requires intermolecular forces?

A
a spider walking on the bottom of a leaf
B
a rock maintaining its solid shape
C
a koala using claws to hold onto a tree
D
a piece of fruit falling from a branch to the ground
4

Which statement best explains why water has a higher boiling point than ethane?

A
Ethane molecules are smaller than water and can move faster.
B
Water molecules need relatively less heat energy to move.
C
Water molecules form hydrogen bonds, which cannot be broken by heating water.
D
Ethane molecules have no hydrogen bonds and need less energy to separate.
5

Which statement about van der Waals forces is true?

A
When the forces are weaker, a substance will have higher volatility.
B
When the forces are stronger, a substance will have lower viscosity.
C
When the forces are weaker, the boiling point of a substance will be higher.
D
When the forces are stronger, the melting point of a substance will be lower.
6

ICl has a higher boiling point than Br2. What is the best explanation for this?

A
Br2 experiences dipole-dipole interactions.
B
ICl experiences dipole-dipole interactions.
C
Br2 forms hydrogen bonds.
D
ICl experiences induced dipole-induced dipole interactions.
7

Substances X and Y are both nonpolar. If the volatility of X is higher than that of Y, what is the best explanation?

A
X’s molecules experience stronger dipole-dipole forces than Y’s molecules.
B
Y’s molecules experience stronger dipole-dipole forces than X’s molecules.
C
X’s molecules experience stronger London dispersion forces than Y’s molecules.
D
Y’s molecules experience stronger London dispersion forces than X’s molecules.
8

Hydrogen bonding is necessary for

A
bonding carbon to oxygen.
B
forming double-stranded DNA molecules.
C
decreasing the boiling point of liquids such as water.
D
causing van der Waals interactions.
9

In the figure below, two nonpolar molecules are interacting. Which interaction would most likely cause these molecules to repel each other?

Question illustration
A
hydrogen bonding
B
dipole-dipole interaction
C
dipole-induced dipole interaction
D
induced dipole-induced dipole interaction
10

Are hydrogen bonds formed between all molecules?

A
No because hydrogen can only form these bonds with oxygen atoms.
B
No because hydrogen can only form these bonds with highly electronegative atoms.
C
Yes because hydrogen can easily form bonds with atoms that have a neutral charge.
D
Yes because hydrogen can form these bonds with weakly electronegative atoms.

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