Solution and Colligative Properties
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Questions and Answers

What is the primary condition for isotonic solutions?

  • Ï€1 = Ï€2 (correct)
  • V1 > V2
  • C1 > C2
  • Ï€1 < Ï€2

Which of the following solutes does not possess the tendency to get associate or dissociate in solution?

  • NaCl
  • Benzoic acid
  • Glucose
  • Urea (correct)

What is the direction of solvent flow in reverse osmosis?

  • From the pure solvent to the solution
  • From the solution to the pure solvent (correct)
  • In the same direction as the usual osmosis
  • None of the above

What is the osmotic pressure of a solution?

<p>The excess hydrostatic pressure that builds up when the solution is separated from the solvent by a semi-permeable membrane (B)</p> Signup and view all the answers

What is the main difference between osmosis and diffusion?

<p>Osmosis involves a semi-permeable membrane while diffusion does not (A)</p> Signup and view all the answers

Which of the following methods is used to measure osmotic pressure?

<p>Pfeffer's method (B)</p> Signup and view all the answers

What is the term for two solutions of different substances having the same osmotic pressure at the same temperature?

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

What is the significance of osmotic pressure in determining the molecular mass of a non-volatile solute?

<p>It is a colligative property that can be used to determine the molecular mass of the solute (C)</p> Signup and view all the answers

What happens when a pressure higher than osmotic pressure is applied to the solution?

<p>The solvent flows from the solution to the pure solvent (C)</p> Signup and view all the answers

What is the relationship between osmotic pressure and the density of the solution?

<p>Osmotic pressure is directly proportional to the density of the solution (A)</p> Signup and view all the answers

What is the characteristic of a maximum boiling azeotrope?

<p>It distills at constant temperature without change in composition (B)</p> Signup and view all the answers

What is the direction of the osmotic flow in endo-osmosis?

<p>Inward flow of water into a cell (B)</p> Signup and view all the answers

What is the result of exo-osmosis on an egg placed in a concentrated NaCl solution?

<p>The egg will shrink (A)</p> Signup and view all the answers

What is the characteristic of a solution with negative deviations?

<p>It has a maximum boiling point (C)</p> Signup and view all the answers

What is the purpose of a semi-permeable membrane in osmosis?

<p>To allow the flow of solvent particles (A)</p> Signup and view all the answers

What is the primary reason for the difference in colligative properties between electrolyte and non-electrolyte solutions of the same molar concentration?

<p>Electrolytes dissociate in solution, resulting in an increase in the number of solute particles. (A)</p> Signup and view all the answers

What is the effect of association of solute molecules on the calculated molecular mass of the solute?

<p>It results in a higher value than the normal value. (C)</p> Signup and view all the answers

What is the underlying assumption for calculating molecular masses using colligative properties?

<p>The solution is dilute, so that Raoult’s law is obeyed. (B)</p> Signup and view all the answers

What is the effect of dissociation of solute molecules on the colligative properties of a solution?

<p>It results in an increase in the values of colligative properties. (A)</p> Signup and view all the answers

What is the unit of molality?

<p>moles per 1000 grams (C)</p> Signup and view all the answers

Why do anomalies arise in the calculated values of colligative properties?

<p>The above assumptions are not valid, leading to anomalies. (C)</p> Signup and view all the answers

What is the relationship between molality and temperature?

<p>Molality is independent of temperature (A)</p> Signup and view all the answers

What is the formula to calculate molality?

<p>Number of moles of solute / Weight of solvent in grams (D)</p> Signup and view all the answers

What is the sum of mole fractions of all components in a solution?

<p>Equal to 1 (A)</p> Signup and view all the answers

Why are molality, mole fraction, and mass fraction preferred over molarity, normality, etc.?

<p>Because they involve weights of solute and solvent (D)</p> Signup and view all the answers

What is the relationship between molarity and molality of a solution?

<p>Molarity is equal to molality multiplied by the specific gravity of the solution (D)</p> Signup and view all the answers

What is the unit of molality?

<p>moles per kilogram (D)</p> Signup and view all the answers

What is the formula to calculate the molecular mass of a solute from its molarity and volume of solution?

<p>Molecular mass = Molarity x (1000 / Volume of solution) (D)</p> Signup and view all the answers

What is the relationship between the molarity of two solutions when they are mixed?

<p>M1 V1 = M2 V2 (C)</p> Signup and view all the answers

What is the formality of a solution?

<p>Normality multiplied by equivalent mass (A)</p> Signup and view all the answers

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