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Questions and Answers

Colligative properties are primarily determined by which of the following?

  • Pressure of solute
  • Number of solute particles (correct)
  • Amount of solvent
  • Number of solvent particles

What is the definition of molality?

  • Number of moles of solvent per 1000 g of solute
  • Number of moles of solute per liter of solution
  • Number of moles of solute per 1000 g of solvent (correct)
  • Number of moles of solvent per liter of solution

Relative lowering of vapor pressure of a solution is directly proportional to which mole fraction?

  • Mole fraction of solute plus solvent
  • Mole fraction of solute (correct)
  • Mole fraction of solvent
  • Mole fraction of solute minus solvent

What is another name for the molal depression constant?

<p>Cryoscopic constant (C)</p> Signup and view all the answers

What is the effect of adding a non-volatile solute on the vapor pressure of a solvent?

<p>Lowers the vapor pressure (B)</p> Signup and view all the answers

When a non-volatile solute is added to a solvent, the vapor pressure of the solvent:

<p>Decreases (A)</p> Signup and view all the answers

The vapor pressure of a solvent will always be:

<p>Greater than that of the solution (C)</p> Signup and view all the answers

What does the term $ΔP$ refer to?

<p>Lowering of vapor pressure (B)</p> Signup and view all the answers

What type of molecules can pass through a semi permeable membrane?

<p>Molecules of solvent (B)</p> Signup and view all the answers

Which method is used to measure osmotic pressure?

<p>Berkley Hartley method (C)</p> Signup and view all the answers

In which solution is the maximum colligative effect observed?

<p>0.1 M NaCl (D)</p> Signup and view all the answers

Abnormal molecular masses arise when there is an association of molecules. What other condition can lead to abnormal molecular masses?

<p>No dissociation of solute (A)</p> Signup and view all the answers

How does the osmotic pressure of a solution change with the number of solute particles?

<p>Increases as the number of solution particles decreases (B)</p> Signup and view all the answers

What is the vapour pressure of an aqueous sodium chloride solution compared to that of pure water?

<p>Less than that of water (B)</p> Signup and view all the answers

When a solute dissociates in a solvent, what happens to the molecular weight obtained by colligative studies?

<p>Greater than the formula molecular weight (D)</p> Signup and view all the answers

What is the term for the ratio of the colligative effect produced by an electrolyte compared to that of a non-electrolyte for the same concentration?

<p>Van't Hoff factor (C)</p> Signup and view all the answers

What is the Vant Hoff equation for osmotic pressure?

<p>$Π = CRT$ (B)</p> Signup and view all the answers

How does depression in freezing point vary in relation to molality?

<p>It increases linearly with molality. (C)</p> Signup and view all the answers

What is the expression for relative lowering of vapor pressure?

<p>$ rac{ΔP}{P_o}$ (C)</p> Signup and view all the answers

Which method is used to determine the osmotic pressure of a solution?

<p>Berkeley-Hartley method (B)</p> Signup and view all the answers

What phenomenon describes the decrease in vapor pressure when a non-volatile solute is added to a solvent?

<p>Lowering of vapor pressure (B)</p> Signup and view all the answers

What equation represents the elevation in boiling point?

<p>$ΔT_b = k_b * m$ (B)</p> Signup and view all the answers

What does the term $k_f$ refer to in the context of freezing point depression?

<p>Freezing point depression constant (C)</p> Signup and view all the answers

Which equation indicates the relationship between depression in freezing point and molality?

<p>$ΔT_f = k_f * m$ (B)</p> Signup and view all the answers

What is the relationship between molal elevation constant $(K_b)$ and heat of vaporization?

<p>Directly proportional to heat of vaporization (B)</p> Signup and view all the answers

The derivation of colligative properties is based on which law?

<p>Ostwald's law (A)</p> Signup and view all the answers

What term is referred to as $K_b$ in the elevation in boiling point equation $ΔT = K_b * m$?

<p>Molal elevation constant (A)</p> Signup and view all the answers

For a solution, the molal elevation constant is determined when the molality is what value?

<p>2 (B)</p> Signup and view all the answers

The colligative effect of an electrolyte compared to a non-electrolyte of the same molar concentration is always:

<p>Equal to (A)</p> Signup and view all the answers

When a non-volatile solute is added to a solvent, the freezing point of the solvent:

<p>Decreases (C)</p> Signup and view all the answers

An aqueous solution of potassium chloride has a boiling point that is:

<p>More than that of water (B)</p> Signup and view all the answers

The flow of solvent molecules occurs from where to where?

<p>Concentrated solution to dilute solution (A)</p> Signup and view all the answers

What causes abnormal molecular masses to be obtained?

<p>Dissociation of molecules (D)</p> Signup and view all the answers

For an electrolyte, what is the expected value of the van't Hoff factor?

<p>Greater than one (A)</p> Signup and view all the answers

What does the van't Hoff factor $i$ represent in solution chemistry?

<p>All of the above (D)</p> Signup and view all the answers

During solvation, how does benzoic acid react when dissolved in benzene?

<p>Solvation (D)</p> Signup and view all the answers

Which statement accurately reflects the process of osmosis?

<p>Osmosis can be reversed by applying pressure on the solution. (D)</p> Signup and view all the answers

Which of the following is classified as a colligative property?

<p>Osmotic pressure (A)</p> Signup and view all the answers

What happens to the colligative effect when a solution is diluted?

<p>Decreases always (C)</p> Signup and view all the answers

Colligative properties depend on which of the following factors?

<p>The relative number of solute and solvent particles (A)</p> Signup and view all the answers

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