7.Separation of Substances (7)
Methods and techniques for separating substances including filtration, evaporation, crystallization, churning, threshing, winnowing, and related concepts about solutions
Questions
The process of increasing the rate of sedimentation in a suspension by adding some chemical is
- Filtration
- Crystallisation
- Loading
- Condensation
The process followed to separate grains form the stalks is called
- Winnowing
- Threshing
- Sieving
- Hand picking
The method that is used to obtain pure salt from impure salt
- Decantation
- Crystallization
- Evaporation
- Condensation
The process of separating the constituents of a liquid by agitating it vigorously
- Evaporation
- Churning
- Filtration
- Sedimentation
A solution which cannot dissolve more of a given substance at a given temperature is
- Solution
- Filtrate
- Saturated solution
- Unsaturated solution
Rain water is a kind of
- saline water
- distilled water
- carbonated water
- saturated water
This harmful microbe in water causes typhoid and jaundice
- Virus
- Bacteria
- Algae
- Fungi
The rate of sedimentation is increased by adding ____ to the water.
- Salt
- Sugar
- Alum
- Soap
Separating the insoluble suspended solids of various sizes from a liquid is called
- Filtration
- Crystallization
- Evaporation
- Condensation
Cotton fibre is separated from cotton seeds by the process of
- churning
- boiling
- colouring
- ginning
Principle behind winnowing is
- Difference in densities of components
- Difference in colours of components
- Difference in appearance of components
- Difference in shapes of components
Paneer is separated from curdled milk
- Condensation
- Filtration
- evaporation
- sedimentation
Corn is separated from husk by the process of
- Sieving
- Winnowing
- Churning
- Handpicking
The method used to separate a dissolved solid component from its solution
- Evaporation
- Filtration
- sedimentation
- Decantation
Butter is separated from curd by the process of
- Filtration
- Heating
- Churning
- Sieving
To evaporate a liquid into its vapour, heat the liquid below its
- Above its melting point
- Below its boiling point
- Below its melting point
- Above its boiling point
A mixture of sugar and water can be separated by
- Filtration
- Evaporation
- Separating funnel
- decantation
A saturated solution can dissolve more of a substance on
- Cooling
- Heating
- Condensing
- Evaporating