MCQ on Methods of Separation in Everyday Life Class 6
Class 6 Science Chapter 9 MCQ Methods of Separation in Everyday Life
Multiple Choice Questions :
Question 1.
Which of the following is a pure substance?
(a) Saltwater
(b) Air
(c) Salt
(d) Soil
Answer:
(c) Salt
Question 2.
Which of the following is an example of a homogeneous mixture?
(a) Sand and salt
(b) Salad
(c) Oil and water
(d) Air
Answer:
(d) Air
Question 3.
Which of the following is a reason for separating mixtures in everyday life?
(a) To enhance the aesthetic appeal
(b) To make substances more difficult to use
(c) To obtain pure substances for specific uses
(d) To increase the number of mixtures
Answer:
(c) To obtain pure substances for specific uses
Question 4.
Paheli bought some vegetables such as french beans, lady’s finger, green chilljes, brinjals and potatoes all mixed in a bag. Which of the following methods of separation would be most appropriate for her to separate them? NCERT Exemplar
(a) Winnowing
(b) Sieving
(c) Threshing
(d) Hand picking
Answer:
(d) Hand picking
Question 5.
Among the following methods, which would be most appropriate to separate grains from bundles of stalks?
(a) Handpicking
(b) Winnowing
(c) Sieving
(d) Threshing
Answer:
(d) Threshing
Question 6.
Which method is used for separating heavier and lighter components by blowing air?
(a) Sieving
(b) Threshing
(c) Winnowing
(d) Sedimentation
Answer:
(c) Winnowing
Question 7.
Four mixtures are given below.
(i) Kidney beans and chickpeas
(ii) Pulses and rice
(iii) Rice flakes and corn
(iv) Potato wafers and biscuits
Which of these can be separated by the method of winnowing?
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (iii) and (iv)
Answer:
(d) (iii) and (iv)
Question 8.
What is the key difference between winnowing and threshing?
(a) Winnowing uses air while threshing uses mechanical force.
(b) Threshing separates soluble from insoluble substances while winnowing separates solid from liquid.
(c) Threshing uses air while winnowing uses mechanical force.
(d) Winnowing separates grains from stalks while threshing separates stones from sand.
Answer:
(a) Winnowing uses air while threshing uses mechanical force.
Question 9.
While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which of the following is the most suitable method to separate the grains from the flour? NCERT Exemplar
(a) Threshing
(b) Sieving
(c) Winnowing
(d) Filtration
Answer:
(b) Sieving
Question 10.
The easiest separating method which can be used to separate wheat bran from flour is.
(a) handpicking
(b) sieving
(c) evaporation
(d) filtration
Answer:
(b) sieving
Question 11.
The ponds and other water bodies dry up at a faster rate during summers by the process known as
(a) evaporation
(b) condensation
(c) decantation
(d) distillation
Answer:
(a) evaporation
Question 12.
In an activity, a teacher dissolved a small amount of solid copper sulphate in a tumbler half-filled with water. Which method would you use to get back solid copper sulphate from the solution? NCERT Exemplar
(a) Decantation
(b) Evaporation
(c) Sedimentation
(d) Condensation
Answer:
(b) Evaporation
Question 13.
During summer, Boojho carries water in a transparent plastic bottle to his school. One day, he left his bottle in the school. The bottle still had some water left in it. The next day, he observed some water droplets on the inner surface of the empty portion of the bottle. These droplets of water were formed due to: NCERT Exemplar
(a) boiling and condensation
(b) evaporation and saturation
(c) evaporation and condensation
(d) condensation and saturation
Answer:
(c) evaporation and condensation
Question 14.
Paheli asked for a glass of water from Boojho, He gave her a glass of ice cold water. Paheli observed some water droplets on the outer surface of the glass and asked Boojho, how these droplets of water were formed? Which of the following should be Boojho’s answer? NCERT Exemplar
(a) Evaporation of water from the glass
(b) Water that seeped out from the glass
(c) Evaporation of atmospheric water vapour
(d) Condensation of atmospheric water vapour
Answer:
(d) Condensation of atmospheric water vapour
Question 15.
A bottle contains either salt or chalk. What process would you use to identify them?
(a) Sedimentation
(b) Evaporation
(c) Winnowing
(d) Sieving
Answer:
(a) Sedimentation
Question 16.
You might have observed the preparation of ghee from butter and cream at home. Which method(s) can be used to separate ghee from the residue?
(i) Evaporation
(ii) Decantation
(iii) Filtration
(iv) Churning
Which of the above combinations are the correct answer? NCERT Exemplar
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) Only (iv)
Answer:
(b) (ii) and (iii)
Question 17.
Which of the following process is used to remove pulp from juice before drinking?
(a) Sedimentation
(b) Hand picking
(c) Decantation
(d) Filtration
Answer:
(d) Filtration
Question 18.
Which of the following mixtures would you be able to separate using the method of filtration? NCERT Exemplar
(a) Oil in water
(b) Cornflakes in milk
(c) Salt in water
(d) Sugar in milk
Answer:
(b) Cornflakes in milk
Question 19.
Tea leaves are separated with a strainer, while pouring tea. What property of tea leaves is used to separate them from the tea? Competency Based Ques.
(a) Size
(b) Mass
(c) Shape
(d) Thickness
Answer:
(a) Size
Question 20.
A student has a solution of salt, sand and water. Which option explains the processes required to separate the salt and sand from water?
(a) Evaporation to remove sand, filtration to obtain salt
(b) Filtration to remove sand, evaporation to obtain salt
(c) Filtration to remove sand, sedimentation to obtain salt
(d) Sedimentation to remove sand, filtration to obtain salt
Answer:
(b) Filtration to remove sand, evaporation to obtain salt
Question 21.
Which of the following can dissolve in water?
(a) Iron dust
(b) Oil
(c) Chalk dust
(d) Salt
Answer:
(d) Salt
Question 22.
Astudent did the following activity to separate the constituents of a mixture as shown below [Competency Based Ques.]
What could have been the mixture?
(a) Water + Sand + Glass
(c) Stones + Rice + Water
(b) Oxygen + Water + Salt
(d) Sand + Sugar + Water
Answer:
(d) Sand + Sugar + Water
Question 23.
Raman had kept three things-sand, salt and rice grains separately to do some experiment. Somehow everything got mixed up. Choose the correct option that contains correct sequence of method which is used to separate all these things again.
(a) Add water, Evaporation, Sieving, Sedimentation
(b) Add water, Sedimentation, Sieving, Evaporation
(c) Add water, Sieving, Evaporation, Sedimentation
(d) Sieving, Add water, Sedimentation, Evaporation
Answer:
(d) Sieving, Add water, Sedimentation, Evaporation
Question 24.
Boojho’s grandmother is suffering from diabetes. Her doctor advised her to take ‘Lassi’ with less fat content. Which of the following methods would be most appropriate for Boojho to prepare it? NCERT Exemplar
(a) Filtration
(b) Decantation
(c) Churning
(d) Winnowing
Answer:
(c) Churning
Question 25.
Which method would be best to separate a mixture of iron filings and rice?
(a) Filtration
(b) Evaporation
(c) Magnetic separation
(d) Sieving
Answer:
(c) Magnetic separation
Question 26.
In the process of sieving, what property of the substances is primarily used to separate them?
(a) Solubility
(b) Density
(c) Particle size
(d) Boiling point
Answer:
(c) Particle size
Question 27.
The first process after harvesting is _______
(a) hand-picking
(b) threshing
(c) sieving
(d) winnowing
Answer:
(b) threshing
Question 28.
Choose the correct statement about decantation from the following.
(a) The process of settling down heavier, insoluble particles in a mixture
(b) The process of changing solid into a vapour state
(c) Separating insoluble solid from a liquid using fitter paper
(d) The process of transferring the clear liquid without disturbing the sediments
Answer:
(d) The process of transferring the clear liquid without disturbing the sediments
Question 29.
Common salt is recovered from sea water by the process of
(a) filtration
(b) condensation
(c) sublimation
(d) evaporation
Answer:
(d) evaporation
Question 30.
Which method would be best to separate a mixture of iron filings and sulfur powder?
(a) Filtration
(b) Magnetic separation
(c) Evaporation
(d) Sieving
Answer:
(b) Magnetic separation
Fill in the Blanks :
1. Insects can be separated from wheat by _______
Answer:
handpicking
2. Crushing paddy under Cattle’s feet to separate grains is called _______
Answer:
threshing
3. Husk from wheat flour is generally removed by _______
Answer:
sieving
4. _______ is used at construction sites to separate pebbles and stones from sand.
Answer:
Slanting sieve
5. The process of settling of heavier particles in a solution is called _______
Answer:
sedimentation
6. The primary purpose of filtration is to separate _______ solids from liquids.
Answer:
insoluble
7. The machine used for carrying out the process of threshing is called _______
Answer:
Thresher
8. Strainer is a type of _______ used to separate tea leaves from tea (liquid).
Answer:
Filter
9. _______ is used to produce butter from curd.
Answer:
Churner
True/False :
1. Separatio
n of components of a mixture is a useful process.
Answer:
True
2. A mixture of wheat grains and rice flakes can be separated by winnowing
Answer:
True
3. A mixture of oil and water can be separated by filtration.
Answer:
False
4. Sugar can be separated from tea by filtration method.
Answer:
False
5. Threshing machines can perform both the tasks of threshing and winnowing.
Answer:
True
6. Evaporation can be used to separate a mixture of oil and water by boiling the mixture.
Answer:
False
7. Slanting sieve used at construction sites is an example of filter.
Answer:
True
8. Winnowing is used to separate heavier grains from lighter husk.
Answer:
True
Match the Columns :
1. Match the Column I with Column II. NCERT Exemplar
Column I (Mixture) | Column II (Separation method) |
A. Oil mixed in water | 1. Sieving |
B. Iron powder mixed with flour | 2. Handpicking |
C. Salt mixed with water | 3. Decantation |
D. Ladyfinger mixed with french beans | 4. Magnet |
E. Rice flour mixed with kidney beans | 5. Evaporation |
Answer:
Column I (Mixture) | Column II (Separation method) |
A. Oil mixed in water | 3. Decantation |
B. Iron powder mixed with flour | 4. Magnet |
C. Salt mixed with water | 5. Evaporation |
D. Ladyfinger mixed with french beans | 2. Handpicking |
E. Rice flour mixed with kidney beans | 1. Sieving |
2. Match the Column I with Column II.
Column I (Mixture) | Column II (Separation method) |
A. Winnowing | 1. Mesh |
B. Sieving | 2. Filter |
C. Threshing | 3. Chaff |
D. Magnetic separation | 4. Iron |
E. Filtration | 5. Grains |
Answer:
Column I (Mixture) | Column II (Separation method) |
A. Winnowing | 3. Chaff |
B. Sieving | 1. Mesh |
C. Threshing | 5. Grains |
D. Magnetic separation | 4. Iron |
E. Filtration | 2. Filter |
3. Match the Column I with Column II
Column I | Column II |
A. Sediment | 1. Mixture |
B. Charcoal | 2. Pure substance |
C. Gold | 3. Filter |
D. Soil | 4. Heavy particles settled at the bottom |
Answer:
Column I | Column II |
A. Sediment | 4. Heavy particles settled at the bottom |
B. Charcoal | 3. Filter |
C. Gold | 2. Pure substance |
D. Soil | 1. Mixture |
Assertion-Reason :
The following questions consist of two statements. Assertion (A) and reason (R). Answer these questions selecting the appropriate option given below.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A .
(c) A is true, but the R is false.
(d) A is false, but the R is true.
1. Assertion (A) Pebbles and flour can be separated by the process of sieving.
Reason (R) Sieving is used when particle size of the two components in the mixture differ.
Answer:
(a) Both A and R are true and R is the correct explanation of A .
2. Assertion (A) Evaporation can be used to separate a solid (like salt, sugar) dissolved in a liquid.
Reason (R) Evaporation is the process in which solid gets convert to vapour form.
Answer:
(c) A is true, but R is false. R can be corrected as evaporation is the process in which liquid gets converted in to vapour form and thus this process can be used to separate solid dissolved in a liquid.
3. Assertion (A) Magnetic separation is used to separate iron filings from a mixture of sand and salt.
Reason (R) Magnetic separation is effective for separating substances based on their magnetic properties.
Answer:
(a) Both A and R are true and R is the correct explanation of A.
Direction The following questions consists of two -statements, Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false.
(d) A is false, but R is true
6. Assertion (A) The mixture of mud and water can be separated by using the process of filtration.
Reason ( R ) The process of separating insoluble substance from a liquid using filter is called filtration.
Answer:
(a) Both A and R are true and R is the correct explanation of A
7. Assertion (A) Winnowing is used to separate grains from husk.
Reason (R) Winnowing relies on differences in sizes of substances.
Answer:
(c) A is true, but R is false.
Case Based Questions :
1. Read the given passage and answer the following questions.
A construction worker poured a bag full of sand on the slanting sieve. All the sand particles filtered through the pores and the dust particles, stones, pebbles and husk still remain.
Question i.
Name the process described above and state its principle.
Answer:
The process used above is sieving.
Principle A mixture of components having different sizes gets separated with the help of a sieve.
Question ii.
Why is a sieve used in this case?
Answer:
A sieve has fine pores in it which lets the small-sized components to pass through, but holds back larger ones.
Question iii.
Why is it necessary to remove pebbles and dust particles from sand used for construction?
Answer:
Sand is sieved, so that it can be used for the construction work without any impurities.
2. Read the given passage and answer the following questions.
A beaker contains a mixture of salt, sand and water. The mixture is filtered using filter paper.
Question i.
What is substance X? [Competency Based Que.]
Answer:
The substance ‘ X ‘ is sand as the process of filtration is used to separate insoluble solid, i.e. sand from its liquid mixture.
Question ii.
Write a single separation method by which water can be separated from a mixture of salt, sand and water.
Answer:
By evaporating the mixture of salt, sand and water, water will get evaporated and separated. But sand and salt will remain in the vessel.
3.
Question i.
You have been given a glass of muddy water, an empty glass and a muslin cloth. Describe a method to obtain clean water. Competency Based Que.
Answer:
Filtration is done to obtain clean water from a glass of muddy water.
Question ii.
Identify the method of separation used to
(a) separate chaff from the grain.
(b) separate tea leaves from water.
Answer:
(a) winnowing
(b) filtration
4. Read the passage carefully and answer the following questions.
Rohit and Raman are best friends. They study in different classes, but in the same standard, Class VI. One day, they were playing in the school. They were throwing sand on each other. Suddenly, Raman asked to Rohit if we mix salt in sand, then how will you separate the mixture of sand and salt?
Rohit was quite intelligent, his science teacher had completed the chapter “methods of separation in everyday life” last week. So, he immediately explained the method of separation, Rohit told him that his teacher had shown this activity in the class and same method is applicable for the separation of mixture of sugar and sand.
Question i.
How is a mixture of sand and salt separated?
Answer:
This is done as follows:
(a) Some water is added to the mixture of sand and salt in a beaker and stirred. Salt dissolves in water to form salt solution, whereas sand remains undissolved. It is then filtered.
(b) On filtering, sand is obtained as a residue on the filter paper and salt solution is obtained as a filtrate.
(c) The filtrate is evaporated and pure salt is left behind.
Question ii.
Name the method (s) which are applicable in the separation of this mixture.
Answer:
The mixture of sand and salt has been separated into its components, i.e. sand and salt by using two methods
(a) filtration
(b) evaporation
Question iii.
What values are shown by Rohit?
Answer:
Rohit is knowledgeable and intelligent boy.
5. Saroj collected muddy water from a pond. He separated the water from the mud in three steps as shown in the pictures below. Competency Based Que.
Question i.
Which separation method did Saroj use at each step? Select the correct row.
Answer:
Question ii.
Which of these properties did Saroj use to separate mud from water?
(a) It floats on water
(b) It dissolves in water
(c) Water turns cloudy due to mud
(d) It is heavier than water
Answer:
(d) It is heavier than water
6. Read this passage and answer the following questions. Ashraf’s grandmother is a diabetic patient. Her doctor advised him to control her sugar level by taking less sugar and less fat content in diet. So, she always prefer to take lassi instead of milk. Ashraf asked her mother when she explained the process of making lassi by removing cream from the curd. She told him this method is known as churning.
Question i.
Explain the process of churning.
Answer:
The process of separation of the lighter particles of a solid from a liquid, by rotating the curd vigorously by-using a churner, is known as churning.
Question ii.
What is the purpose of this method?
Answer:
The purpose of churning is to remove butter from the curd or buttermilk. So in lassi, there is a less fat content as compared to milk.
Question iii.
What values are shown by Ashraf?
Answer:
Ashraf is curious and intelligent boy.
7. Two beakers A and B are shown below, components of each has been labelled.
Paheli wants to mix the components of beakers, A and B. However, she wants to first separate as many components as possible. Answer the following questions for her activity.
(i) Order of separation of components from beaker A would be
(a) Oil layer > water = sand
(b) Sand = water > oil layer
(c) Sand > oil layer> water
(d) Water > oill layer > sand
Answer:
(a) Oil layer rests on the top of the solution hence it should be removed first. Sand is removed either by decantation or filtration. Hence, Doth are collected together separately. Correct order is Oil layer > water = sand.
Question ii.
Paheli can remove layer of oil by
(a) filtration
(b) decantation
(c) handpicking
(d) evaporation
Answer:
(b) Decantation is the process used to remove layer of oil from water sand solution as it forms a separate layer on top.
8. Rajesh was drinking water at his home and he noticed the water was not tasting good. He noticed water contained various impurities, such as dirt and sand. He tried to make the water clean and fit for drinking. Answer the following questions:
Question i.
Which separation method is used to remove large particles like sand and mud from water?
Competency Based Que.
(a) Evaporation
(b) Distillation
(c) Decantation
(d) Churning
Answer:
(c) Decantation
Question ii.
During the decantation process, what happens to the impurities in the water?
(a) They dissolve into the water
(c) They float on the surface
(b) They are filtered out
(d) They settle at the bottom of the container
Answer:
(d) They settle at the bottom of the container
9. Pragati was helping her mother in the making of butter. She was amazed to see how easily the butter got separated from milk with the help of a churner.
Question i.
What is the process that is being used above?
(a) Grinding
(b) Mashing
(c) Churning
(d) Threshing
Answer:
(c) Churning
Question ii.
The principle behind the process of churning is
(a) lighter particles of a solid gets separated from liquid
(b) heavier particles gets settled at the bottom
(c) heavier particles forms heap and lighter particles gets swept away by wind
(d) particles of different sizes gets separated
Answer:
(a) lighter particles of a solid gets separated from liquid