Quiz for Raoult’s law

Q1: Raoult’s law is applicable to which type of solution?

A. Ideal solutions B. Non-ideal solutions C. Electrolytic solutions D. All types of solutions

Q2: In Raoult’s law, partial vapour pressure of a component is directly proportional to its:

A. Density B. Volume C. Mole fraction D. Molality

Q3: Which of the following deviates positively from Raoult’s law?

A. Acetone + Chloroform B. Benzene + Toluene C. Acetone + Carbon disulfide D. Water + Nitric acid

Q4: Which of the following is an ideal solution?

A. Ethanol + Acetone B. Benzene + Toluene C. Acetone + Aniline D. Water + Alcohol

Q5: For a binary liquid solution obeying Raoult’s law, the total vapour pressure varies:

A. Linearly with mole fraction B. Exponentially with mole fraction C. Not at all D. Inversely with mole fraction

Q6: Raoult’s law becomes a special case of:

A. Colligative property B. Dalton’s law of partial pressure C. Henry’s law D. Boyle’s law

Q7: In an ideal solution, ΔHmix and ΔVmix are:

A. Positive B. Negative C. Zero D. Infinite

Q8: Raoult’s law fails for:

A. Solids in liquids B. Liquids in liquids C. Non-volatile solutes D. Gases in liquids

Q9: Which factor affects deviation from Raoult’s law?

A. Temperature only B. Intermolecular interactions C. Pressure only D. Volume only

Q10: The vapour pressure of pure solvent is always:

A. Equal to that of solution B. Greater than that of solution C. Less than that of solution D. Unpredictable

Q11: Negative deviation from Raoult’s law indicates:

A. Weaker solute-solvent attraction B. Stronger solute-solvent attraction C. Ideal behaviour D. No interaction

Q12: Which combination shows negative deviation?

A. Acetone + Chloroform B. Carbon tetrachloride + Benzene C. Acetone + Carbon disulfide D. Hexane + Heptane

Q13: If two liquids form azeotrope, they:

A. Obey Raoult’s law B. Show maximum deviation only C. Can’t be separated by distillation D. Form immiscible layers

Q14: A solution obeys Raoult’s law when:

A. No solute is present B. Enthalpy change is zero C. Solute is non-volatile D. Solvent is volatile

Q15: Total vapour pressure of an ideal solution is:

A. Sum of mole fractions B. Product of vapour pressures C. Sum of partial vapour pressures D. Product of mole fraction and pressure

Q16: Raoult’s law relates to which property?

A. Chemical potential B. Boiling point C. Vapour pressure D. Freezing point

Q17: Deviation from Raoult’s law is due to:

A. Volume change B. Pressure change C. Temperature change D. Enthalpy change

Q18: Raoult’s law is obeyed by:

A. All dilute solutions B. All concentrated solutions C. Only ideal solutions D. None of these

Q19: Raoult’s law relates vapour pressure with:

A. Concentration B. Molar mass C. Volume D. Boiling point