CBSE Class 6 Science Separation Of Substances Worksheet Set B

Multiple Choice Questions

Question. Which of the following processes is used to remove stone from wheat?
(a) Threshing
(b) Winnowing
(c) Handpicking
(d) None of these
Answer : C

Question. Which method would you use to separate soil from muddy water (i.e. soil suspended in water)?
(a) Sedimentation
(b) Decantation
(c) Evaporation
(d) Both sedimentation and decantation
Answer : C

Question. Winnowing is the commonly used method to separate lighter husk particles from heavier seeds of grains. When farmers use this method the heap near the platform for winnowing will be of
(a) husk
(b) seeds of grain
(c) mixture of husk particles and seeds of grains
(d) can't predict
Answer : B

Question. A covered glass jar containing a wet piece of cotton is placed in sunlight for an hour. Tiny droplets of water are noticed sticking to the upper inner surface of glass jar. This is due to
(a) evaporation
(b) condensation
(c) transpiration
(d) both (a) and (b)
Answer : D

Question. Choose correct alternative to complete the given analogy.
Muddy water : sedimentation : Butter from milk: _______________
(a) Filtration
(b) Churning
(c) Sublimation
(d) Evaporation
Answer : B

Question. Which of the following is not a separation technique?
(a) Churning
(b) Loading
(c) Stirring
(d) Sieving
Answer : C

Question. The process that we use to separate grain from stalks is
(a) handpicking
(b) threshing
(c) winnowing
(d) None of these
Answer : B

Question. A process in which the impure sample is first heated in order to vapourise the liquid and then these vapours of liquid are made to cool to give pure liquid is called
(a) condensation
(b) distillation
(c) sublimation
(d) None of these
Answer : B

Question. Which of the following is commonly used to separate bran present in flour ?
(a) Handpicking
(b) Winnowing
(c) Sieving
(d) Any of these
Answer : C

Question. Which method will be used to remove tea leaves from brew?
(a) Handpicking
(b) Filtration
(c) Threshing
(d) Any of these
Answer : B

Question. Which of the following is not used in filtration?
(a) Filter paper
(b) Filter funnel
(c) Thresher
(d) None of these
Answer : C

Question. Which process is used to remove pulp from juice before drinking?
(a) Handpicking
(b) Sedimentation
(c) Decantation
(d) Filtration
Answer : D

Question. To get paneer, we add lemon drops to boiling milk. We can see solid paneer particles being formed. Paneer is then separated by using
(a) strainer
(b) alum
(c) stirrer
(d) None of these
Answer : A

Question. Which method would you use to separate the components of salt solution?
(a) Decantation
(b) Filtration
(c) Evaporation
(d) Sublimation
Answer : C

Question. Which process is used for separation of cream from milk?
(a) Filtration
(b) Threshing
(c) Handpicking
(d) Churning
Answer : D

Question. Salt is obtained from sea water by which process?
(a) Evaporation
(b) Filtration
(c) Decantation
(d) Condensation
Answer : A

Question. Which method is used to separate heavier and lighter components in a mixture by wind?
(a) Handpicking
(b) Threshing
(c) Winnowing
(d) Sieving
Answer : C

Question. Which one is used to separate a mixture of oil and water?
(a) Sieving
(b) Decantation
(c) Filtration
(d) Evaporation
Answer : B

Question. Generally the dirt particles are separated from pulses before cooking. For this the pulse is generally washed with water. Allowed to stand for some time and then the water is removed. It is an example of which process?
(a) Condensation
(b) Filtration
(c) Threshing
(d) Decantation
Answer : D

Question. The machine used for carrying out the process of threshing is called
(a) strainer
(b) ladle
(c) thresher
(d) None of these
Answer : C

Question. Saturated solution is
(a) a solution which can dissolve more of a solute at a given temperature
(b) a solution which cannot dissolve more of solute at a given temperature
(c) a solution which can dissolve solute at a lower temperature
(d) None of these
Answer : B

Question. Sedimentation process can be speeded up by loading. Which of the following is used in loading?
(a) Common salt
(b) Oxygen
(c) Alum
(d) Sugar
Answer : C

Question. Which method is used to get pure solvent from a solution?
(a) Distillation
(b) Centrifugation
(c) Filtration
(d) Using alum crystals
Answer : A

Question. Why alum is used to purify muddy water?
(a) Mud gets dissolved due to alum
(b) Mud floats due to alum
(c) Mud settles down due to alum
(d) Alum kills germs from muddy water
Answer : C

Question. Which of the following mixtures could not be separated into its components by decanting?
(a) Beans in hot water
(b) Sand in water
(c) Oil in water
(d) Coffee in hot water
Answer : D

Question. Which method will you use to obtain pure alum from its solution?
(a) Evaporation
(b) Filteration
(c) Sublimation
(d) Distillation
Answer : A

Question. If boiled milk is allowed to cool for sometime and is then poured on a piece of cloth, we find that cream (malai) is left behind on cloth. This process of separating cream from milk is
(a) filtration
(b) decantation
(c) sedimentation
(d) churning
Answer : A

Question. Which of the following process can be considered as reverse of condensation?
(a) Evaporation
(b) Vaporisation
(c) Boiling
(d) None of these
Answer : A

Question. Which property is used in separating a mixture of two solids by winnowing?
(a) Difference in odour
(b) Difference in weight
(c) Difference in size
(d) Difference in colour
Answer : B

Question. In winnowing the components of a mixture are separated by
(a) blowing air
(b) water
(c) Both of above
(d) None of these
Answer : A

Question. If muddy water taken from a pond is allowed to stand undisturbed for some time we find that the dirt particles present in muddy water get settled at the bottom of container. This process will be called
(a) sedimentation
(b) decantation
(c) filtration
(d) evaporation
Answer : A

Question. Which of the following statements is false?
(a) Tea can be separated from the leaves by filtration.
(b) A mixture of salt and sand can be separated by distillation.
(c) Winnowing will separate wheat grains from husk and dust.
(d) A mixture of sand and salt is partially soluble in water.
Answer : B

Question. Find the odd one out
(a) Ploughing
(b) Handpicking
(c) Winnowing
(d) Threshing
Answer : A

Question. Decantation refers to
(a) the process of mechanically transferring a clear liquid without disturbing the settled solid particles.
(b) the process of allowing the solid particles to settle at the bottom.
(c) a combination of both the above
(d) None of these
Answer : A

Question. Which method is used in coffee machines to separate ground coffee from the coffee solution?
(a) Evaporation
(b) Condensation
(c) Filtration
(d) Distillation
Answer : C

Question. A student has been assigned with the task to separate the oil from water. He would go for which of the following separation process?
(a) Filtration
(b) Distillation
(c) Decantation
(d) Condensation
Answer : C

Question. Evaporation means going from a liquid to a _________.
(a) liquid
(b) solid
(c) gas
(d) None of these
Answer : C

Question. Which of the following given natural process is an example of condensation process?
(a) Formation of rainbow
(b) Formation of clouds
(c) Blue colour of sea
(d) Formation of salt from sea water
Answer : B

Question. You can use decantation to separate
(a) two miscible liquids
(b) two immiscible liquids
(c) two metals in an alloy
(d) solid-solid mixture
Answer : B

Question. In a saturated sugar solution more sugar can be dissolved by ___________.
(a) cooling
(b) stirring
(c) heating
(d) None of these
Answer : C

Question. If Ram pours the water off after boiling the potatoes, what is this an example of ?
(a) Evaporation
(b) Handpicking
(c) Threshing
(d) Decantation
Answer : D

Question. The process of condensation is one in which
(a) the vapours of water are allowed to cool and change into liquid water
(b) the vapours of a liquid are allowed to cool and change into liquid state
(c) the vapours of a substance are changed directly to solid state
(d) a liquid is heated to get its vapours.
Answer : B

Question. On keeping ice pieces in glass tumbler, lots of water droplets are observed on the surface of the tumbler. This is due to ________.
(a) Evaporation
(b) Sedimentation
(c) Decantation
(d) Condensation
Answer : D

Question. Which of the following process is not an example of evaporation process?
(a) Drying of clothes
(b) Formation of salt from sea water
(c) Formation of small droplets at the surface of a bottle containing ice cold water.
(d) Drying of wet hairs
Answer : C

More Question..

Q.1 Multiple choice questions (Choose the correct option)

(A) Most of the substances we see around us are
(a) Pure Elements
(b) Pure Compounds
(c) Mixtures

(B) A solution of salt in water is a?
(a) Compound
(b) Homogeneous Mixture
(c) Heterogeneous Mixture
(d) Element

(C) The property used in separating a mixture of two solids by winnowing is
(a) difference in color
(b) difference in size
(c) difference in weight
(d) Attraction by magnet

(D) Which method is used to obtain pure liquid from a solution?
(a) Distillation
(b) Condensation
(c) Filtration
(d) Loading

(E) Which of the following can dissolve in water?
(a) Only Solids
(b) Only solids and liquids
(c) Solids, liquids & gases
(d) only liquids

Q.2 What is separation?

Q.3 Why the separation of substances is necessary?

Q.4 What is the basis of separation of components of mixture?

Q.5 When do we use hand picking as the method of separation?

Q.6 What is threshing? How is it done?

Q.7 Define winnowing? What is the principle of using winnowing as method of separation?

Q.8 Where do we find sieving as the method of separation?

Q.9 You are given a mixture of sand, salt and iron filling. Suggest some methods for separating all the components of this mixture?

Q.10 Define filtration? Give 3 examples where filtration method is used.

Q.11 What is evaporation? Where do we use this method at home?

Q.12 What method is used to separate salt from sea water and how?

Q.13 In which cases handpicking is enough as a method of separation?

Q.14 One method of separation is not enough. Comment.

Q.15 Differentiate between a pure substance and a mixture.

Q.16 Is the separation of two immiscible liquids using separating funnel same as decantation?

Q.17 What do you use to remove discarded tea leaves from tea?

Q.18 What impurities are present when you buy wheat, rice or pulses from the market?

Q.19 What is the process called when stem of plants (stalks) are beaten to separate grains?

Q.20 What process is used to separate light solid particles from heavier solid particles?

Q.21 What will settle down when mud and rice are added to water?

Q.22 What is the process called when strainer or filter funnel is used?

Q.23 What is a solution called which contains the maximum amount of dissolved solute?

Q.24 How do you separate a light liquid from a heavier liquid?

HOTS QUESTIONS

Q.1 You are given a sample of water. How will you find out whether it is pure or not?

Q.2 A bottle contains either salt or chalk. How will you find out what it has, without tasting it.

Q.3 Sea water has salt dissolved in it. You know that pure water can be obtained from sea water by distillation. However, this method is not used to get drinking water from sea water. What do you think is the reason?