Practice IMF and Phase Change

Navigation » List of Schools » Los Angeles Harbor College » Chemistry » Chem 065 – Introductory General Chemistry » Winter 2024 » Practice IMF and Phase Change

Need help with your exam preparation?

Existing Quiz Clients Login here

Below are the questions for the exam with the choices of answers:

Try The Exam

Question #1

Define freezing.

A the phase transition from liquid to solid

B the phase transition from gas to solid

C the phase transition from solid to gas

D the phase transition from gas to liquid

E the phase transition from liquid to gas

Question #2

Define sublimation.

A the phase transition from gas to solid

B the phase transition from gas to liquid

C the phase transition from liquid to solid

D the phase transition from solid to gas

E the phase transition from liquid to gas

Question #3

Describe sweating in humans.

A The sweat evaporates absorbing heat from the body.

B None of these

C All of these

D The skin is cooled.

E It is an endothermic reaction.

Question #4

Define condensation.

A A gas becomes a liquid.

B A solid becomes a liquid.

C A liquid becomes a solid.

D A gas becomes a solid.

E A liquid becomes a gas.

Question #5

Define vaporization.

A A solid becomes a liquid.

B A liquid becomes a gas.

C A gas becomes a liquid.

D A gas becomes a solid.

E A solid becomes a gas.

Question #6

Identify the compound with the lowest boiling point.

A CH3CH2CH3

B (CH3)2O

C CH3OCH3

D CH3CHO

E CH3CN

Question #7

The change of a substance from a liquid to a gaseous form is called:

A condensation.

B heat of fusion.

C vaporization.

D dynamic equilibrium.

E volatile.

Question #8

Rank the compounds NH3, CH4, and PH3 in order of increasing boiling point.

A NH3 < CH4< PH3

B NH3 < PH3< CH4

C PH3< NH3 < CH4

D CH4< NH3 < PH3

E CH4 < PH3 < NH3

Question #9

Which substance would be expected to have the highest boiling point?

A N2

B CO

C not enough information

D CO2

E O2

Question #10

Which compound will have the highest boiling point?

A CH3CH2OH

B CH3CH3

C not enough information

D CH3C(O)CH3

E CH4

Question #11

Consider the three compounds below, then choose the compound(s) that have hydrogen bonding.
1. H2
2. CH4
3. HF

A Only compound 1 has hydrogen bonding.

B Only compound 3 has hydrogen bonding.

C All three of these compounds have hydrogen bonding.

D Only compound 2 has hydrogen bonding.

Question #12

Which intermolecular force found in CCl2H2 is the strongest?

A dipole-dipole forces

B X-forces

C dispersion forces

D none of these

E hydrogen bonding

Question #13

What types of forces exist between I2 molecules?

A dipole-dipole forces

B dispersion forces

C ion-dipole forces

D none of these

E hydrogen bonding

Question #14

Which intermolecular forces are found in CO2?

A dispersion forces

B none of these

C dipole-dipole forces

D dispersion forces and dipole-dipole forces

E hydrogen bonding

Question #15

Which state of matter has a low density and is easily compressed?

A none of these

B liquids

C both solids and liquids

D solids

E gases

Question #16

Which intermolecular forces are found in CCl4?

A X-forces

B none of these

C dipole-dipole forces

D hydrogen bonding

E dispersion forces

Question #17

Which molecule below has hydrogen bonding?

A H2O

B HF

C NH3

D all of these

E CH3OH

Question #18

Which molecule below has hydrogen bonding?

A all of these

B HCl

C CH4

D H2

E CH3CH2OH

Question #19

Which statement below is false?

A A hydrogen bond is only 2-5% the strength of a typical covalent bond.

B none of these

C A hydrogen atom must be bonded directly to fluorine, oxygen, or nitrogen to exhibit hydrogen bonding.

D The large electronegativity difference between hydrogen and an F, O, or N atom is essential for the formation of a hydrogen bond.

E A hydrogen bond is the strongest of the intermolecular forces.

Question #20

Which substance is most likely to be miscible with water?

A none of these

B Br2

C CS2

D CF4

E CHCl3

Question #21

Substance A is a molecular compound that dissolves in gasoline but not in water. The molecules of A are very likely:

A nonpolar.

B nonmetallic.

C metallic.

D polar.

E none of these

Question #22

Which intermolecular force is common to all polar molecules but NOT nonpolar molecules?

A dispersion forces

B none of these

C X-forces

D dipole-dipole forces

E hydrogen bonding

Question #23

Assuming that the molecules carbon monoxide (CO) and nitrogen (N2) have similar electron clouds, which statement below is TRUE?

A Both CO and N2 must have the same boiling point.

B N2 has the higher boiling point because it experiences dipole-dipole forces.

C CO has the higher boiling point because it experiences dipole-dipole forces.

D none of these

E The N2 has the higher boiling point because it has greater dispersion forces.

Question #24

Which state of matter has a low density and an indefinite volume?

A both solids and liquids

B gases

C none of these

D liquids

E solids

Question #25

Which noble gas has the highest boiling point?

A Ar

B He

C Xe

D Kr

E Ne

Question #26

Which intermolecular force increases with increasing molar mass?

A dispersion forces

B hydrogen bonding

C none of these

D dipole-dipole forces

E X-forces

Question #27

Which substance below has dipole-dipole forces?

A F2

B H2S

C CO2

D none of these

E CH4

Question #28

Which intermolecular force is due to the formation of an instantaneous dipole?

A X-forces

B hydrogen bonding

C dipole-dipole forces

D dispersion forces

E none of these

Question #29

Which intermolecular force is present in all molecules and atoms?

A X-forces

B dipole-dipole forces

C hydrogen bonding

D none of these

E dispersion forces

Question #30

Paradichlorobenzene, a material used in “moth balls,” is known to go directly from a solid form to a gaseous form. This process is known as:

A evaporation

B melting

C boiling

D sublimation

E condensation

Question #31

Which state of matter has a high density and a definite volume?

A none of these

B liquids

C gases

D both solids and liquids

E solids

Question #32

Gaseous water vapor can frost the windows of a car on a cold morning. This process of a gas changing directly into a solid is known as:

A deposition.

B sublimation.

C none of these

D melting.

E condensation.

Question #33

Which statement is TRUE in describing what occurs when a solid melts to a liquid?

A The process is exothermic and the heat of fusion is positive.

B not enough information

C The process is endothermic and the heat of fusion is positive.

D The process is exothermic and the heat of fusion is negative.

E The process is endothermic and the heat of fusion is negative.

Question #34

When you make ice cubes:

A it is an endothermic process.

B the heat of vaporization must be removed.

C the process is referred to scientifically as sublimation.

D it is an exothermic process.

E none of these

Question #35

Which state of matter has a high density and an indefinite shape?

A gases

B liquids

C none of these

D solids

E both solids and liquids

Question #36

The amount of heat required to melt one mole of a solid is called the:

A heating curve.

B none of these

C cooling curve.

D heat of fusion.

E heat of vaporization.

Question #37

The opposite process of freezing is:

A boiling.

B condensation.

C sublimation.

D evaporation.

E none of these

Question #38

Which of the following statements is false?

A none of these

B As a liquid is converted into a gas, the liquid absorbs heat.

C A puddle of water cools down as it evaporates.

D all of these

E Evaporation is an endothermic process.

Question #39

Evaporation is:

A an endothermic process.

B the opposite process to condensation.

C all of these

D increased by increasing temperature.

E a cooling process for humans when they sweat.

Try The Exam

Fresh Grad Lands Job as Real Estate Agent With Help from Professional Writers

Practice IMF and Phase Change

Need help with your exam preparation?

Below are the questions for the exam with the choices of answers:

Christian S.

Tyra

Linda

Manush

We accept payment