EMOT CHEMISTRY QUIZ (Separation of mixture)
EMOT Chemistry Quiz: Separation of Mixtures
Test your knowledge on the separation techniques used in chemistry with our engaging EMOT Chemistry Quiz! This quiz will challenge your understanding of physical and chemical changes, mixtures, and various methods of separation.
Whether you're a student looking to enhance your learning or just curious about chemistry, this quiz offers:
- 25 multiple-choice questions
- Interactive learning experience
- Instant feedback on your answers
By means of filtration one component can be obtained pure from an aqueous mixture of sodium chloride and
Potassium nitrate
Sand
Lead nitrate
Sugar(glucose)
One of the following techniques can be used to show that chlorophyll pigments is a mixture of chemical compounds and not a single coloured compound
Crystallization
Hydrolysis
Sublimation
Chromatography
Which of the following compounds and elements would sublime on exposure to the atmosphere ?
Ice
Sulphur
Phosphorus
Iodine
Which of the following process does not lead to chemical change
Stirring iron in sulphur (vi) acid
Stirring sodium carbonate in water
Stirring glucose in conc. Sulphur (vi)acid
Titrating an acid against a base
Sodium chloride may be obtained from brine by
Titration
Decantation
Distillation
Evaporation
A brand of ink containing Cobalt (ll) , copper (ll) and iron(ll)ions can best be separated into its various components by
Fractional crystallization
Fractional distillation
Sublimation
Chromatography
Which of the following substances is a mixture?
Granulated sugar
Sea-water
Sodium chloride
Iron filings
Which of the following would support the conclusion that a solid sample is a mixture?
The solid can be ground to a fine powder
The density of the solid is 2.2g/dm³
The solid has a melting range of 300°C to 375°C
The solid absorbs moisture from the atmosphere.
Which of the following is a physical change
The bubbling of chlorine into water
The bubbling of chlorine into a gas jar containing hydrogen
The dissolution of sodium chlorine in water
The passing of steam over heated iron
Which of the following substances is not a homogeneous mixture?
Filtered sea water
Soft drink
Flood water
Writing ink
Which of the following substances is mixture?
Sulphur powder
Bronze
Distilled water
Ethanol
A pure solid usually melts
Over a wide range of temperature
Over a narrow range of temperature
At a lower temperature than the impure one
At the same temperature as the impure one
Chromatography is used to separate components of mixtures which differ in their rates of
Diffusion
Migration
Reaction
Sedimentation
Which of the following is an example of chemical change ?
Dissolution of salt in water
Rusting of iron
Melting of ice
Separating a mixture by distillation
The addition of water to calcium oxide leads to
A physical change
A chemical change
The formation of a mixture
An endothermic change
A mixture of iron and sulphur can be separated by dissolving the mixture in
Steam
Dilute hydrochloric acid
Dilute sodium hydroxide
Benzene
Sieving is a technique used to separate mixtures containing solid perticles
Small sizes
Large sizes
The same size
Different sizes
Pure solvents are obtained by
Distillation
Condensation
Extraction
Evaporation
The chromatographic separation of ink is based on the ability of components to
React with each other
React with solvent
Dissolve in each other in the column
Move at different speeds in the column
Which of the following is a physical change ?
Burning kerosine
Freezing ice-cream
Exposing white phosphorus to air
Dissolving calcium in water
When a solid substance dissapears completely as a gas on heating, the substance is said to have undergone
Evaporation
Distillation
Crystallization
Sublimation
The property used in the industrial preparation of nitrogen and oxygen from air is
Rate of diffusion
Solubility
Density
Boiling point
Sugar is separated from its impurities by
Distillation
Evaporation
Precipitation
Crystallization
The presence of an impurity in a substance will cause the melting point to
Be stable
Be zero
Reduce
Increase
Which of the following is an example of a mixture ?
Blood
Sand
Washing soda
Common salt
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