CBSE Questions for Class 6 Chemistry Separation Of Substances Quiz 1 - MCQExams.com

 Water can be separated from salt through:
  • distillation
  • evaporation
  • filtration
  • sublimation
Threshing is used for separating
  • two same size particles
  • same color particles
  • different color particles
  • seeds from harvesting stalks
The mixture of pebbles and sand can be separated by using handpicking.
  • True
  • False
To separate a mixture in which the solid is insoluble in the liquid, and is also heavier than the liquid, which of the following methods of separation are most suited?
  • Sedimentation and decantation
  • Evaporation followed by condensation
  • Filtration
  • Condensation and crystallization
Which is the correct order to separate salt from a mixture of salt and sand?
  • Dissolving, Filtration, Evaporation
  • Filtration, Dissolving, Evaporation
  • Filtration, Evaporation, Dissolving
  • Evaporation, Dissolving, Filtration
Winnowing is used to separate:
  • heavier and lighter particles of mixture. 
  • different sized particles in the mixture.
  • a mixture of insoluble solid and liquid.
  • None of these
At a particular temperature, a solution that has dissolved as much solute as it is capable of dissolving is said to be a:
  • saturated solution
  • unsaturated solution
  • both A and B
  • none of the above
A solution which contains maximum possible amount of solute at any given temperature is called a:
  • saturated solution
  • supersaturated solution
  • dilute solution
  • unsaturated solution
A mixture of sodium chloride and $${H_2O}$$ can be separated by:
  • Filteration
  • Handpicking
  • Evaporation
  • Distillation
solution of sugar in which some more sugar could be dissolved without changing its temperature is called a/an :
  • unsaturated solution
  • saturated solution
  • solid solution
  • None of the above
State true or false.
A mixture of powdered salt and sugar can be separated by the process of winnowing.
  • True
  • False
Wheat flour can be separated from wheat bran by:
  • evaporation
  • sieving
  • churning
  • None of these
 Sieving allows the fine particles to pass through the holes of the sieve while the bigger flour particles remain in the sieve.
  • True
  • False
Which of the following represents correct statement(s)?
  • Winnowing is the process that is used to separate grain from stalks.
  • In winnowing, the stalks are beaten to free the grain seeds.
  • Winnowing is the process used to separate heavier and lighter components of a mixture by wind or by blowing air.
  • All of the above.
Handpicking can be used as a separation technique if the particle size of the constituents of the mixture is the same.
  • True
  • False
Identify the methods which are used for separation.
  • Handpicking
  • Threshing
  • Winnowing
  • All of the above
The mixtures having more than ______ components can be separated by more than one method.
  • two
  • three
  • four
  • five
________ is/are generally used for filtration. 
  • Cloth
  • Filter paper
  • Both A and B
  • None of these
A saturated solution of $$NaCl$$ on heating :
  • becomes supersaturated.
  • becomes unsaturated.
  • remains saturated.
  • vapourises.
What would you observe when an aqueous sugar solution is heated to dryness?
  • Water will vaporize
  • Sugar will be left behind in the container
  • Sugar gets mixed with water and vaporize
  • Sugar gets charged
The term used for the process of separation of grains from chaff is:
  • Sieving
  • Threshing
  • Winnowing
  • Hand picking
Saturated solution of salt on heating:
  • becomes supersaturated
  • becomes unsaturated
  • remains saturated
  • vaporises
Salt can be recovered from its solution by evaporation. Another technique which can be used for the separation of a salt from its solution is :
  • centrifugation
  • sublimation
  • evaporation
  • crystallization
State whether the statement is true or false:
A saturated solution is one which can dissolve more of the solute at a given temperature.
  • True
  • False
Sugar syrup, usually used to coat sweets with sugar, becomes hard when cooled. From this, we can conclude that sugar syrup is:
  • a saturated solution
  • an unsaturated solution
  • not a solution
  • none of these
Chalk powder can be separated from the water using the method of ___________
  • Sedimentation
  • Condensation
  • Decantation
  • Filtration
A mixture of glucose water can be separated by the method of 
  • evaporation
  • handpicking
  • winnowing
  • none of these
Which of the following process is used to obtain common salt from seawater?
  • Distillation
  • Evaporation
  • Filtration
  • Sublimation
Bullocks are used in:
  • threshing
  • filtration
  • winnowing
  • sieving
  • All of the above
Wheat flour is separated from wheat bran by the method of:
  • handpicking
  • sieving
  • winnowing
  • filtration
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