Chemistry · Science General
Separation Techniques
813 Questions
Separation techniques involve physical methods to isolate mixtures, including distillation, filtration, and crystallization. Competitive exams frequently test these foundational concepts. Review the exact processes to enhance problem solving speed.
Distillation and evaporationCrystallization processFiltration methodsSeparating dissolved solidsChromatography and mass techniques
Separation Techniques Questions
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Mixture of sulphur and sand
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Mixture of iron ore and sand
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Mixture of sand and chalk powder
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Mixture of KNO3 and NaCl
A
Correct answer
Explanation
Mixture of sulphur and sand can be separated through solvent extraction method.
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different densities
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different boiling temperature
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different weights
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none of these
B
Correct answer
Explanation
Fractional distillation is used for refining petroleum because of hydrogen fractions which have different boiling temperatures.
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Iodine and salt
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Sodium nitrate and sodium chloride
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Sugar and sand
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Iron ore and impurities
A
Correct answer
Explanation
As iodine sublimes on heating, it can be separated by the process of sublimation.
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Fractional crystallisation
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Solvent extraction
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Sublimation
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Gravity separation
B
Correct answer
Explanation
Sulphur dissolves in carbon disulphide. Therefore, it can be separated from sand.
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High mass of iron
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Magnetic properties
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Chemical properties
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Density of iron
B
Correct answer
Explanation
Due to magnetic property of iron, it is easily separated from its mixture.
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Magnetic separation
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Gravity separation
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Mechanical picking
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Solvent extraction
B
Correct answer
Explanation
They can be separated by gravity separation as sugar is soluble in water and sand is heavier.
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Sublimation
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Fractional crystallization
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Solvent extraction
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Mechanical picking
C
Correct answer
Explanation
Solvent extraction utilises difference in solubilities of components.
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filtration
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evaporation
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distillation
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decanation
C
Correct answer
Explanation
Distillation involves conversion of liquid into vapour, and then back into liquid.
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Using a separating funnel
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Distillation
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Filtration
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Evaporation
B
Correct answer
Explanation
Difference in boiling points allows separation of these liquids by distillation.
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Sedimentation
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Solvent extraction
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Distillation
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Boiling
B
Correct answer
Explanation
Solvent extraction can be used to separate solid-solid mixtures.
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Heating of liquid
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Separation of solid-liquid mixtures
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Separation and recovery of dissolved solid and liquid
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Conversion of liquid to vapour
C
Correct answer
Explanation
Separation and recovery of dissolved solid and liquid is possible only in distillation. It is not possible in evaporation.
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Fractional distillation
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Sedimentation
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Filtration
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Solvent extraction
A
Correct answer
Explanation
Diesel, natural gas, etc. are obtained from crude petroleum by fractional distillation.
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Distillation
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Evaporation
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Using separating funnel
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Using fractional distillation
C
Correct answer
Explanation
Immiscible liquids are separated by using a separating funnel.
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Distillation
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Evaporation
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Fractional distillation
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Sedimentation
C
Correct answer
Explanation
It is used to separate liquid-liquid mixtures.
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Chromatography
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Fractional distillation
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Separating funnel
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Sublimation
A
Correct answer
Explanation
Chromatography has an advantage. It can separate substances present in very small quantities.