Separation of Mixtures
Methods and techniques for separating components of mixtures, including physical separation processes like filtration, distillation, solvent extraction, sublimation, and chromatography.
Questions
Why is the separation of rock and diamond done by mechanical picking?
- It is because they have different reactivities.
- It is because they have different solubilities.
- It is because they have different colours.
- It is because they have different melting points.
Which of the following can be separated by sublimation?
- Iodine and salt
- Sodium nitrate and sodium chloride
- Sugar and sand
- Iron ore and impurities
Which method is used to seperate a mixture of sand and sulphur?
- Fractional crystallisation
- Solvent extraction
- Sublimation
- Gravity separation
Which property of iron helps in its separation from a mixture?
- High mass of iron
- Magnetic properties
- Chemical properties
- Density of iron
Which method is used to separate sugar and sand?
- Magnetic separation
- Gravity separation
- Mechanical picking
- Solvent extraction
Which characteristic of copper allows it to be easily separated from iron?
- Colour
- Melting point
- Density
- Boiling point
Which method of separation is used when components are soluble in water but their solubilities are different?
- Sublimation
- Fractional crystallization
- Solvent extraction
- Mechanical picking
The process of converting a liquid into its vapour by heating and then condensation of vapour back into liquid is called
- filtration
- evaporation
- distillation
- decanation
By which process are the suspended particles removed from natural water?
- Evaporation
- Solvent extraction
- Filtration
- Sedimentation
Alcohol (boiling point - 78.5°C) and water (boiling point - 100°C) are miscible. How can they be separated?
- Using a separating funnel
- Distillation
- Filtration
- Evaporation
Which of the following methods is used to separate solid-solid mixtures?
- Sedimentation
- Solvent extraction
- Distillation
- Boiling
Which of the following is not common to evaporation and distillation?
- Heating of liquid
- Separation of solid-liquid mixtures
- Separation and recovery of dissolved solid and liquid
- Conversion of liquid to vapour
Which method is used to obtain diesel, natural gases, etc. from crude petroleum?
- Fractional distillation
- Sedimentation
- Filtration
- Solvent extraction
Kerosene and oil are immiscible. How are they commonly separated?
- Distillation
- Evaporation
- Using separating funnel
- Using fractional distillation
Which of the following is not used to separate solid-liquid mixtures?
- Distillation
- Evaporation
- Fractional distillation
- Sedimentation
Which method is used to separate few micrograms of a substance in a mixture?
- Chromatography
- Fractional distillation
- Separating funnel
- Sublimation
Which method utilises difference in boiling points for separation of two miscible liquids?
- Separating funnel
- Chromatography
- Fractional distillation
- Filtration
Which of the following is not true about chromatography?
- It consists of two fixed phases.
- It is used to purify industrial products.
- It identifies different constituents of a mixture.
- It can separate quantities of the order of microgram.
The process of sublimation is used to separate a mixture of salt and ammonium chloride, because
- ammonium chloride directly changes from solid to liquid state on heating
- ammonium chloride directly changes from liquid to solid state on heating
- ammonium chloride directly changes from solid to gaseous state on heating
- ammonium chloride directly changes from gaseous state to solid state on heating
Which of the following is not true regarding methane?
- It is composed of more than one element.
- Its elements are chemically combined.
- Its constituents are separated by chemical or electrochemical means only.
- Its elements are combined in variable proportions.