Quiz: Liquid and Solution (CHM 103 Gr. 5)

London dispersion forces ……

• form only between polar molecules.

• form only between nonpolar molecules.

• can form between any molecules.

• are stronger among smaller molecules

Which of the following does NOT result from the strong hydrogen bonds in water molecules?

• Water droplets have a spherical shape.

• A leaf will float on the surface of water rather than sink.

• Water molecules interact more strongly with each other than with other compounds.

• Water pours more quickly than motor oil.

If a nonpolar substance dissolves easily into an unknown liquid, the liquid solvent is most likely ……

• water.

• nonpolar.

• polar.

• Can be either polar or nonpolar.

In a solution, the substance which is being dissolved is the_____.

• Solvent

• Solute

• Liquid

• Gas

20% alcohol is dissolved in 80% water to form a solution. Which is the solute in this solution?

• Water

• Alcohol

• None of these

• Both of these

An alloy is an example of a _____.

• Gaseous solution

• Complex solution

• Solid solution

• Liquid solution

A solution that contains all the solute it can hold at a given temperature is _____.

• Supersaturated

• Diluted

• Saturated

• Unsaturated

How many grams of NaCl can dissolve in 100 g of water at 80 ⁰C?

• 30 g

• 35 g

• 40 g

• 45 g

What is the minimum temperature where at least 60 g of KNO₃ can dissolve?

• 30 ⁰C

• 40 ⁰C

• 50 ⁰C

• 60 ⁰C

When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:

• supersaturated

• unsaturated

• saturated

• concentrated