Chemistry Intermolecular Forces

Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?

• IV only

• II and V

• I and III

• IV and II

Which number represents the hydrogen that is capable of hydrogen bonding in acetic acid?

• (i)

• (ii)

• (iii)

•  (iv)

Consider the following structures. If the A-B bonds are polar, which of the following molecules are polar?

• I and III

• II and V

•  I, II, and IV

• II and IV

Water (H2O) and dihydrogen monosulfide (H2S) have similar chemical formulas and structures. At room temperature, H2O is a liquid and H2S is a gas. Which of the following best explains this difference?

• H2S molecules are larger and exhibit stronger London dispersion forces and require a greater amount of energy to break.

• H2S molecules are larger and thus the electrons are not attracted as strongly, which makes the  covalent bonds in H2S molecules easier to break.

•  H2O molecules exhibit hydrogen bonding, and thus the attractive forces between water  molecules are stronger than the attractive forces between H2S molecules.

• H2O molecules are smaller and thus exhibit weaker London dispersion forces and require a lesser amount of energy to break

Tags

NGSS.HS-PS1-1

Which of the following lists all intermolecular forces experienced between this molecule and an identical molecule?

• Covalent bonding, dipole-dipole, and London dispersion forces would be present. 

• Only dipole-dipole and London dispersion forces would be present

• Only covalent bonding and London dispersion forces would be present.

• Only London dispersions forces would be present.

Which of the following describes changes in forces of attraction that occur as H2O changes phase from liquid to gas?

• H – O bonds break as H – H and O – O bonds form.

• Hydrogen bonds between H2O molecules are broken

• Covalent bonds between H2O molecules are broken

• Ionic bonds between H+ and OH- ions are broken

Tags

NGSS.MS-PS1-4

The boiling points of three halide compounds are shown above. Which of the following identifies the substance that  has the strongest intermolecular forces and provides reasoning?

• CH2Cl2, because it has the lowest boiling point.

• CH2Cl2, because it exhibits hydrogen bonding

• CH2Br2, because it has the highest boiling point

• CH2I2, because it has the highest boiling point

Tags

NGSS.HS-PS3-4

A diagram of methanol molecules is shown here. Which letter labels a line that represents hydrogen bonding between the molecules?

• A

• B

• C

• D

Tags

NGSS.HS-LS1-6

For a container of liquid trimethylamine, what intermolecular forces would be present?

• London Dispersion Forces

• London Dispersion Forces, Dipole-Dipole

• London Dispersion Forces, Dipole-Dipole, Hydrogen Bonding

• London Dispersion Forces, Dipole-Dipole, Covalent bonds

For a container of liquid propylamine, what intermolecular forces would be present?

• London dispersion forces

• London dispersion forces, dipole-dipole forces

• London dispersion forces, dipole-dipole forces, hydrogen bonding

• London dispersion forces, dipole-dipole forces, covalent bonding