Quiz for Colligative properties

Q1: Which colligative property is used to determine molar mass?

A. Relative lowering of vapour pressure B. Osmotic pressure C. Boiling point elevation D. Freezing point depression

Q2: Which of the following is not a colligative property?

A. Vapour pressure lowering B. Boiling point elevation C. Freezing point depression D. Viscosity

Q3: Colligative properties depend on:

A. Nature of solute B. Number of solute particles C. Volume of solvent D. Molar mass of solvent

Q4: Which property decreases with addition of non-volatile solute?

A. Boiling point B. Freezing point C. Vapour pressure D. Osmotic pressure

Q5: Van’t Hoff factor (i) for NaCl is:

A. 1 B. 1.5 C. 2 D. 3

Q6: Which solution has maximum freezing point depression?

A. 1 M glucose B. 1 M NaCl C. 1 M MgCl₂ D. 1 M Al₂(SO₄)₃

Q7: Osmotic pressure is given by the equation:

A. π = CRT B. π = nRT/V C. π = RT/C D. π = CnRT

Q8: Freezing point of solution is lower due to:

A. Increase in vapour pressure B. Decrease in vapour pressure C. Boiling point increase D. Solute-solvent interaction

Q9: Molal elevation constant is related to:

A. Freezing point B. Boiling point C. Osmotic pressure D. Vapour pressure

Q10: i (Van’t Hoff factor) = 1 implies:

A. Dissociation B. Association C. No dissociation or association D. Dilute solution

Q11: Which of these will have lowest vapour pressure?

A. 0.1 M glucose B. 0.1 M NaCl C. 0.1 M MgCl₂ D. 0.1 M AlCl₃

Q12: Which colligative property is most useful for macromolecules?

A. Boiling point elevation B. Freezing point depression C. Osmotic pressure D. Vapour pressure lowering

Q13: Molality is preferred in colligative property because:

A. Depends on volume B. Changes with pressure C. Independent of temperature D. Easy to measure

Q14: Which has maximum boiling point?

A. Pure water B. 0.1 m glucose C. 0.1 m NaCl D. 0.1 m CaCl₂

Q15: Unit of molal elevation constant is:

A. K mol⁻¹ B. K kg mol⁻¹ C. mol kg⁻¹ D. mol L⁻¹

Q16: Abnormal molar mass arises due to:

A. Dilution B. Temperature C. Ionization or association D. None

Q17: Which is not affected by atmospheric pressure?

A. Boiling point B. Vapour pressure C. Freezing point D. Osmotic pressure

Q18: Boiling point of a solution is always:

A. Higher than pure solvent B. Equal to solvent C. Lower than solvent D. Unpredictable

Q19: In dilute solution, van’t Hoff factor for acetic acid is:

A. 1 B. >1 C. <1 D. 0

Q20: For 1 mol Na₂SO₄, number of particles in solution:

A. 1 B. 2 C. 3 D. 4