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Questions and Answers

What is the term used to describe the difference in the boiling point of a solution and the boiling point of the pure solvent?

  • Depression of boiling point
  • Freezing point elevation
  • Elevation of boiling point (correct)
  • Osmotic pressure elevation

What is the process of studying the elevation in boiling point of a liquid in which a non-volatile solute is dissolved?

  • Thermometry
  • Osmometry
  • Ebullioscopy (correct)
  • Cryoscopy

What is the pressure at which a liquid boils at its normal boiling point?

  • 760 mm (correct)
  • 820 mm
  • 800 mm
  • 720 mm

What is the term used to describe a solution that has more osmotic pressure than another solution?

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

What is the effect of adding a non-volatile solute to a pure solvent on its vapour pressure?

<p>It decreases the vapour pressure (A)</p> Signup and view all the answers

What is the difference in the freezing point of a pure solvent and a solution called?

<p>Depression of freezing point (B)</p> Signup and view all the answers

What is the relationship between depression in freezing point and the lowering of vapour pressure?

<p>Depression in freezing point is directly proportional to the lowering of vapour pressure (C)</p> Signup and view all the answers

What is the unit of molal depression constant (Kf)?

<p>K kg/mol (A)</p> Signup and view all the answers

What is the expression for the depression in freezing point of a solution?

<p>ΔTf = Kf × m (C)</p> Signup and view all the answers

What is the relationship between the elevation in boiling point and the lowering of vapour pressure?

<p>Elevation in boiling point is directly proportional to the lowering of vapour pressure (A)</p> Signup and view all the answers

What is the term given to the study of the depression in freezing point of a solution?

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

What is the expression for the molality of a solution in terms of the depression in freezing point?

<p>m = 1000 × Kf × w / ΔTf × W (D)</p> Signup and view all the answers

What is the value of Kb for water in degree Celsius per kilogram per mole?

<p>0.52 (D)</p> Signup and view all the answers

What is the relationship between the freezing point of a solution and that of the pure solvent?

<p>The freezing point of a solution is always lower than that of the pure solvent. (A)</p> Signup and view all the answers

What is the effect of dissociation of a solute on the molality of the solution?

<p>The molality of the solution increases. (D)</p> Signup and view all the answers

What is the relationship between the osmotic pressure of a solution and the flow of solvent?

<p>The flow of solvent is always from lower osmotic pressure to higher osmotic pressure. (A)</p> Signup and view all the answers

What is the effect of association of a solute on the boiling point of a solution?

<p>The boiling point of the solution decreases. (C)</p> Signup and view all the answers

What is the relationship between the molecular weight of a solute and its boiling point elevation?

<p>The boiling point elevation is inversely proportional to the molecular weight of the solute. (C)</p> Signup and view all the answers

What is the advantage of using mole fraction over molarity?

<p>Mole fraction is independent of temperature (D)</p> Signup and view all the answers

Why is mass fraction preferred over molarity?

<p>Mass fraction involves the weights of the solute and solvent (D)</p> Signup and view all the answers

What is the effect of temperature on the volume of a solution?

<p>It has a significant effect on the volume of the solution (C)</p> Signup and view all the answers

What is the demal unit of concentration?

<p>One mole of solute per litre of solution at 0°C (A)</p> Signup and view all the answers

What is the formula for mass fraction of a component in a solution?

<p>Mass of component / Total mass of solution (C)</p> Signup and view all the answers

Why is molality preferred over molarity?

<p>Molality involves the weights of the solute and solvent (A)</p> Signup and view all the answers

What is the condition for two solutes to be isotonic?

<p>They have the same osmotic pressure (B)</p> Signup and view all the answers

What is the effect of dissociation of a solute on the boiling point elevation of a solution?

<p>It increases the boiling point elevation (A)</p> Signup and view all the answers

What is the unit of the molal elevation constant (Kb)?

<p>deg kg mol^-1 (A)</p> Signup and view all the answers

What is the relationship between the mass fraction of a solute and its boiling point elevation?

<p>The boiling point elevation is directly proportional to the mass fraction (D)</p> Signup and view all the answers

What is the effect of temperature on the osmotic pressure of a solution?

<p>The osmotic pressure increases with an increase in temperature (A)</p> Signup and view all the answers

What is the relationship between the mole fraction of a solute and its boiling point elevation?

<p>The boiling point elevation is directly proportional to the mole fraction (B)</p> Signup and view all the answers

What is the reason for the difference in boiling point of a solution and the pure solvent?

<p>The addition of a non-volatile solute lowers the vapour pressure of the solvent (D)</p> Signup and view all the answers

What is the effect of adding a non-volatile solute to a pure solvent on its boiling point?

<p>It increases the boiling point of the solvent (B)</p> Signup and view all the answers

What is the relationship between the vapour pressure of a solution and that of the pure solvent?

<p>The vapour pressure of the solution is lower than that of the pure solvent (B)</p> Signup and view all the answers

What is the term used to describe the difference in the boiling point of a solution and the boiling point of the pure solvent?

<p>Elevation in boiling point (A)</p> Signup and view all the answers

What is the method used to determine the elevation in boiling point?

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

What is the effect of adding a non-volatile solute to a pure solvent on its freezing point?

<p>It decreases the freezing point of the solvent (C)</p> Signup and view all the answers

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