Raoult’s law and Phase Equilibria II Lowersixth Science Chemistry

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Test your understanding of solutions concepts.

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Raoult’s law and Phase Equilibria II Lowersixth Science Chemistry


Froggy Jumps Raoult’s law and Phase Equilibria II Lowersixth Science ChemistryOnline version Test your understanding of solutions concepts. by YAKILI LMS 1 What is an ideal solution? a Never shows any volume change on mixing b Is always a mixture of metals c Renders Raoult's law nearly ideal 2 Raoult's law applies best to? a Ideal solutions b Gaseous mixtures c Suspensions 3 Key property of ideal solutions at constant T and P? a Vapor pressure follows Raoult's law b Density doubles c Boiling point decreases linearly 4 What happens to volume on mixing in ideal solutions? a Volume always increases b No significant change c Volume always decreases 5 Which component dominates in ideal solutions' vapor pressure? a Partial pressures sum to total b Total pressure is constant c Only the stronger solvent contributes 6 Non-ideal solutions show deviation from? a Avogadro's law b Raoult's law c Ideal gas law 7 What often causes non-ideality? a Low temperature only b Strong solute-solvent interactions c Presence of solids 8 Positive deviation from Raoult's law indicates? a No interactions at all b Stronger interactions than ideal c Weaker solute-solvent interactions 9 Negative deviation from Raoult's law indicates? a Weaker interactions b Ideal behavior c Stronger solute-solvent interactions 10 Which type of solution shows non-ideal behavior due to size mismatch? a Size effects in liquid mixtures b Only gas mixtures c Ideal behavior remains 11 Define immiscible liquids. a Liquids that mix completely b Liquids that do not mix c Liquid with zero solubility 12 Example of immiscible pair? a Acetone and water b Oil and water c Alcohol and water 13 Which process occurs at immiscible interfaces? a A separate phase forms b Reaction occurs immediately c Uniform solution forms instantly 14 Uses of immiscible liquids include? a Liquid-liquid extraction b Freezing point depression c Catalysis 15 Non-miscible liquids have? a A single homogeneous phase b Two distinct layers c Gaseous mixture 16 Which property changes with non-ideality in solutions? a Vapor pressure b Only boiling point c Only color 17 Non-ideal solutions: in which phase do deviations occur? a Solid phase b Gas phase c Liquid phase 18 What is a practical use of non-ideal solutions? a Lubricant synthesis b Control of distillation c Manufacturing metals 19 Define miscible liquids. a Liquids that mix to form one phase b Liquids that form suspensions c Liquids that react vigorously 20 Which pair is miscible at all ratios? a Mercury and water b Ethanol and water c Oil and water 21 Why do some liquids become immiscible? a Same polarity same b Differences in polarity c High temperature only 22 Examples of uses of immiscible liquids? a Extraction and separations b Electroplating c Polymerization 23 What is a eutectic mixture related to a Pure substance b Ideal gas c Immiscible liquids scenario 24 Which is true for ideal solutions' volume change on mixing? a Volume expands significantly b Volume is conserved c Volume collapses 25 Which statement best fits Raoult's law? a Vapor pressure independent of composition b Vapor pressure = mole fraction × pure vapor pressure c Vapor pressure equals temperature 26 Non-ideal behavior often observed in? a Concentrated solutions b Pure solvents c Aqueous solutions only 27 Which helps separate immiscible liquids? a High temperature pressure b Centrifugation is not needed c Solid catalyst 28 What is an example of a miscible pair? a Mercury and water b Oil and water c Acetic acid and water 29 Non-ideal solution properties depend on? a Melting point only b Color only c Interaction energy 30 Effect of temperature on Raoult's law ideal behavior? a Only at high solute b Typically valid for low solute c Independent of temperature 31 Non-miscible liquids form what at rest? a Gas bubble layer b One clear solution c Two layers 32 Which term describes a mixture that doesn't mix well? a Non-ideal solution b Ideal solution c Pure substance 33 What often causes non-ideality in solutions? a Volume contraction/expansion b Color change only c Magnetic property 34 Which is a characteristic of ideal solutions? a Total pressure stays constant b Vapor pressures add c Only solvent's vapor pressure matters 35 A practical use of immiscible liquids is? a Fermentation b Solidification c Oil-water separation 36 Which concept explains deviations in real solutions? a Crystal lattice energy b Molar volume c Intermolecular forces 37 What happens when two miscible liquids are ideal? a No volume change on mixing b Volume doubles c Volume becomes unpredictable 38 Non-ideal solutions are common in? a Pure liquids only b Gases only c Aqueous or concentrated systems 39 Which is a feature of immiscible liquid mixtures? a Single phase b Uniform refractive index c Distinct interfaces 40 The term miscible means liquids that? a React to form solids b Dissolve in each other c Form suspensions 41 Which is a consequence of non-ideality? a No phase diagram change b Boiling point fixed c Vapor pressure deviates from Raoult's law 42 What is a common use of non-ideal solutions theory? a Electric conductivity only b Colorimetry only c Predicting boiling point elevations 43 Which liquids are least likely to mix? a Non-polar with polar b Liquids of similar density c Polar with polar 44 Which statement describes ideal mixing enthalpy? a Large endothermic change b Large exothermic change c Zero enthalpy change 45 What causes two immiscible liquids to separate? a Same color only b Same density only c Different densities and immiscibility 46 Non-ideal behaviour is more pronounced at? a Low temperatures only b Very dilute solutions c High concentrations 47 Which property helps distinguish immiscible liquids? a Constant color throughout b No separation c Clear phase separation 48 Which law is used to describe ideal vapor pressures? a Henry's law b Charles' law c Raoult's law 49 Which is an immiscible pair with water? a Oil b Ethanol c Acetone 50 Which is a popular extraction solvent pair? a Water and ethanol b Water and air c Water and mercury

Raoult’s law and Phase Equilibria II Lowersixth Science Chemistry

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Raoult’s law and Phase Equilibria II Lowersixth Science ChemistryOnline version

by YAKILI LMS

What is an ideal solution?

Raoult's law applies best to?

Key property of ideal solutions at constant T and P?

What happens to volume on mixing in ideal solutions?

Which component dominates in ideal solutions' vapor pressure?

Non-ideal solutions show deviation from?

What often causes non-ideality?

Positive deviation from Raoult's law indicates?

Negative deviation from Raoult's law indicates?

Which type of solution shows non-ideal behavior due to size mismatch?

Define immiscible liquids.

Example of immiscible pair?

Which process occurs at immiscible interfaces?

Uses of immiscible liquids include?

Non-miscible liquids have?

Which property changes with non-ideality in solutions?

Non-ideal solutions: in which phase do deviations occur?

What is a practical use of non-ideal solutions?

Define miscible liquids.

Which pair is miscible at all ratios?

Why do some liquids become immiscible?

Examples of uses of immiscible liquids?

What is a eutectic mixture related to

Which is true for ideal solutions' volume change on mixing?

Which statement best fits Raoult's law?

Non-ideal behavior often observed in?

Which helps separate immiscible liquids?

What is an example of a miscible pair?

Non-ideal solution properties depend on?

Effect of temperature on Raoult's law ideal behavior?

Non-miscible liquids form what at rest?

Which term describes a mixture that doesn't mix well?

What often causes non-ideality in solutions?

Which is a characteristic of ideal solutions?

A practical use of immiscible liquids is?

Which concept explains deviations in real solutions?

What happens when two miscible liquids are ideal?

Non-ideal solutions are common in?

Which is a feature of immiscible liquid mixtures?

The term miscible means liquids that?

Which is a consequence of non-ideality?

What is a common use of non-ideal solutions theory?

Which liquids are least likely to mix?

Which statement describes ideal mixing enthalpy?

What causes two immiscible liquids to separate?

Non-ideal behaviour is more pronounced at?

Which property helps distinguish immiscible liquids?

Which law is used to describe ideal vapor pressures?

Which is an immiscible pair with water?

Which is a popular extraction solvent pair?