Solids & Fluids

High viscosity occurs because particles are closer together and the cohesive force is stronger.

• True

• False

Surface tension is the property of water in which...

• water molecules at the surface tend to stick together as a result of strong cohesive forces

• water spills easily as a result of weak cohesive forces

• water spills easily as a result of weak adhesive forces

• water molecules at the surface tend to stick together as a result of strong adhesive forces

Attractions between water molecules are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Which of the following explanations is the reason why Xe has a higher boiling point compared to He, Ne, Ar, and Kr?

• Xe has more electrons and is thus it is more polarizable making the LDFs stronger.

• Xe has a higher effective nuclear charge than the other noble gases being compared.

• Xe has London dispersion forces and is the atoms are cohesive.

• the other noble gases being compared have LDFs while Xe has dipole-dipole forces.

Which of the following has the lowest boiling point?

• CaCl₂
• PH₃
• Cl₂
• N₂

Which of the following has the highest boiling point?

• H₂
• NH₃
• N₂
• O₂

Tags

NGSS.HS-PS1-1

Which of the following will take the longest to evaporate?

• CH₃CH₂OH
• CH₃OH
• CH₃CH₃

Tags

NGSS.HS-PS1-3

Water moves from the soil up through a plant due to __.

• capillary action

• a change in density

• a change in temperature

• the presence of a surfactant

The shape (convex vs concave) of a liquid's meniscus is determined by ____.

• the viscosity of the liquid

• the type of material the container is made of

• the relative magnitudes of cohesive forces in the liquid and adhesive forces between the liquid and its container

• the amount of hydrogen bonding in the liquid

Which of these typically increases when IMF's increase?

• boiling point
• melting point
• viscosity
• all of these