Gr12 - Che - Solutions - MCQ

Molality is defined as ________ divided by _____________

• liters solution, mols solute

• mols solute, liters solvent

• kg solvent, mols solute

• mols solute, kg solvent

Molarity is defined as _________ divided by ___________

• mol, liters

• mol, kg

• kg, liters

• liters, kg

How many mols of HCl are in 3 liters of 2.0M HCl solution?

• 2.0

• 1.5

• 6.0

• 0.66

Colligative properties depend on the _____ of solute particles in solution.

• type
• number
• pH
• nature

The freezing point of a solution is ____ the freezing point of the pure solvent.

• the same as
• lower than
• higher than
• no relation to

The boiling point of a solution is ______ the boiling point of the pure solvent.

• higher than
• the same as
• lower than
• higher or lower than

The van't Hoff factor measures the number of particles formed in solution. What is the van't Hoff factor for the compound Na₂SO₄?

• 1

• 3

• 5

• 7

Adding a nonvolatile solute to a liquid will ___.

• depress both the freezing point and the boiling point

• elevate both the freezing point and the boiling point

• depress the freezing point and elevate the boiling point

• elevate the freezing point and depress the boiling point

Electrolytes have a greater effect on colligative properties than nonelectrolytes do because electrolytes

• are volatile

• have higher boiling points

• produce fewer moles of solute particles per mole of solvent

• produce more moles of solute particles per mole of solvent

A substance has a melting point of -125 ^oC and a boiling point of -35 ^oC. What state is it at 15^oC?

• Solid

• Liquid

• Gas