CBSE Class 6 Science Chapter 9: Methods of Separation in Everyday Life — Assertion & Reason
CBSE Class 6 Science Assertion & Reason
Expert crafted · Instant PDF download · 2026-27
The following Assertion and Reason questions are based on Chapter 9: Methods of Separation in Everyday Life from the NCERT Class 6 Science textbook Curiosity. Each question has four options — read both the Assertion (A) and Reason (R) carefully before selecting your answer.
How to attempt Assertion & Reason questions:
(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.
(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.
Assertion & Reason Questions
1
Assertion (A): Handpicking is a convenient method for separating small stones from wheat.
Reason (R): Handpicking is used when the impurities are present in small quantities and can be easily picked by hand due to differences in size, colour, or shape.
Reason (R): Handpicking is used when the impurities are present in small quantities and can be easily picked by hand due to differences in size, colour, or shape.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Handpicking is ideal for removing visible impurities that exist in small amounts and are distinct enough to be picked out manually.
2
Assertion (A): Farmers beat stalks of harvested crops on a large wooden log.
Reason (R): Beating the stalks helps to separate the grains from them, a process known as threshing.
Reason (R): Beating the stalks helps to separate the grains from them, a process known as threshing.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Threshing is the specific mechanical process of beating harvested stalks to free the edible grains from them.
3
Assertion (A): A mixture of wheat grains and husk can be separated by winnowing.
Reason (R): Winnowing separates heavier and lighter components of a mixture by wind or blowing air.
Reason (R): Winnowing separates heavier and lighter components of a mixture by wind or blowing air.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. When the mixture is dropped from a height, the wind carries the lighter husk away, while the heavier wheat grains fall straight down.
4
Assertion (A): Sieving allows larger particles like bran and small stones to pass through the holes of a sieve.
Reason (R): Sieving is used when components of a solid-solid mixture have different sizes.
Reason (R): Sieving is used when components of a solid-solid mixture have different sizes.
Answer: (d)
A is false, but R is true. Sieving allows fine particles (like flour) to pass through the holes, while the larger particles (like bran and stones) remain trapped on the sieve.
5
Assertion (A): Common salt is obtained from seawater by the process of evaporation.
Reason (R): Seawater is kept in shallow pits and exposed to sunlight, allowing the water to evaporate completely and leaving the solid mixture behind.
Reason (R): Seawater is kept in shallow pits and exposed to sunlight, allowing the water to evaporate completely and leaving the solid mixture behind.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The heat from the sun evaporates the water over a few days, leaving behind the solid salts which are then purified.
6
Assertion (A): Salt can be separated from its solution in water by heating it in a china dish.
Reason (R): Heating causes the water to boil away as vapour, leaving the solid salt behind in the dish.
Reason (R): Heating causes the water to boil away as vapour, leaving the solid salt behind in the dish.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Evaporation uses heat to convert the liquid solvent (water) into gas, isolating the dissolved solid solute (salt).
7
Assertion (A): When preparing tea without a strainer, the tea leaves can be separated by sedimentation and decantation.
Reason (R): In sedimentation, the heavier tea leaves settle at the bottom, and the liquid can be removed by tilting the vessel in a process called decantation.
Reason (R): In sedimentation, the heavier tea leaves settle at the bottom, and the liquid can be removed by tilting the vessel in a process called decantation.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Allowing the leaves to settle (sedimentation) and gently pouring off the clear liquid (decantation) is an effective way to separate the components without a tool.
8
Assertion (A): Decantation completely separates all the tea leaves from the tea.
Reason (R): Filtration using a strainer is a more effective method to separate tea leaves because the strainer collects all the leaves while letting the liquid pass.
Reason (R): Filtration using a strainer is a more effective method to separate tea leaves because the strainer collects all the leaves while letting the liquid pass.
Answer: (d)
A is false, but R is true. Decantation cannot completely separate all tea leaves, as some will inevitably pour out with the liquid; filtration with a strainer provides a much cleaner separation.
9
Assertion (A): A piece of cloth can be used as a filter to separate solid impurities from a liquid.
Reason (R): The cloth has very small holes or pores between its woven threads that act as a filter.
Reason (R): The cloth has very small holes or pores between its woven threads that act as a filter.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The tiny gaps in the woven fabric allow liquids to pass through while trapping solid particles, functioning just like a standard filter.
10
Assertion (A): A filter paper can be used to separate very fine mud particles from water.
Reason (R): A filter paper has even smaller pores than a piece of cloth, allowing it to filter out very fine impurities.
Reason (R): A filter paper has even smaller pores than a piece of cloth, allowing it to filter out very fine impurities.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. When cloth is not fine enough to trap extremely small mud particles, filter paper is used because its microscopic pores catch the finer residue.
11
Assertion (A): Butter can be extracted from curd by the process of churning.
Reason (R): During churning, the heavier butter settles at the bottom while the lighter buttermilk floats at the top.
Reason (R): During churning, the heavier butter settles at the bottom while the lighter buttermilk floats at the top.
Answer: (c)
A is true, but R is false. While churning is used to extract butter, butter is actually the lighter component that floats to the top, leaving the heavier buttermilk behind.
12
Assertion (A): Iron nails mixed with sawdust can be separated using a magnet.
Reason (R): Iron is a magnetic substance and gets attracted towards the magnet, leaving the non-magnetic sawdust behind.
Reason (R): Iron is a magnetic substance and gets attracted towards the magnet, leaving the non-magnetic sawdust behind.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Magnetic separation exploits the magnetic property of iron to easily pull it out of a non-magnetic mixture like sawdust.
13
Assertion (A): Pebbles and stones are separated from sand at construction sites using sieves.
Reason (R): The holes of the sieve allow the larger pebbles to pass through while retaining the fine sand.
Reason (R): The holes of the sieve allow the larger pebbles to pass through while retaining the fine sand.
Answer: (c)
A is true, but R is false. Sieving is used at construction sites, but the process works because the fine sand passes through the holes, while the larger pebbles and stones remain on top of the sieve.
14
Assertion (A): In Ayurveda, medicinal herbs are often dried in the shade to prepare remedies.
Reason (R): Drying facilitates the evaporation of excess water, leaving behind the important medicinal parts of the plant.
Reason (R): Drying facilitates the evaporation of excess water, leaving behind the important medicinal parts of the plant.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Drying utilizes the process of evaporation to remove moisture so that only the concentrated medicinal properties remain.
15
Assertion (A): A mixture containing more than two components always requires only a single method of separation.
Reason (R): Different properties of the components, such as size, solubility, and magnetic nature, determine the appropriate combination of separation methods.
Reason (R): Different properties of the components, such as size, solubility, and magnetic nature, determine the appropriate combination of separation methods.
Answer: (d)
A is false, but R is true. A complex mixture generally requires a combination of several separation methods applied in sequence, depending on the unique properties of each component.
16
Assertion (A): A mixture of oil and water can be separated by the process of decantation.
Reason (R): Oil and water do not mix and form separate layers when left undisturbed for some time.
Reason (R): Oil and water do not mix and form separate layers when left undisturbed for some time.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. Because oil and water are immiscible and form distinct layers, the top layer (oil) can be carefully poured off (decanted) from the water.
17
Assertion (A): White patches often form on dark-coloured clothes worn during hot summers.
Reason (R): Sweat contains salt and water, and when the water evaporates, the solid salt is left behind as white patches.
Reason (R): Sweat contains salt and water, and when the water evaporates, the solid salt is left behind as white patches.
Answer: (a)
Both A and R are true, and R is the correct explanation of A. The heat of the summer sun causes the water in sweat to evaporate rapidly, leaving the dissolved salts as a visible white residue on the fabric.
18
Assertion (A): Modern threshing machines (threshers) perform both threshing and winnowing simultaneously.
Reason (R): Threshers separate the grains from stalks but cannot remove the lighter husk from the grains.
Reason (R): Threshers separate the grains from stalks but cannot remove the lighter husk from the grains.
Answer: (c)
A is true, but R is false. Technological developments have resulted in modern threshers that efficiently perform both the tasks of threshing (beating) and winnowing (blowing away husk) simultaneously.
19
Assertion (A): Once salt is dissolved in water to form a solution, it cannot be recovered.
Reason (R): The process of evaporation can be used to recover the dissolved salt by heating the solution until all the water turns into vapour.
Reason (R): The process of evaporation can be used to recover the dissolved salt by heating the solution until all the water turns into vapour.
Answer: (d)
A is false, but R is true. Dissolving salt is a reversible change; the salt is completely recoverable by evaporating the liquid water.
20
Assertion (A): Handpicking is the best method to separate salt from sand.
Reason (R): Handpicking is only convenient when the components are large enough to be picked by hand and present in small quantities.
Reason (R): Handpicking is only convenient when the components are large enough to be picked by hand and present in small quantities.
Answer: (d)
A is false, but R is true. Salt and sand particles are far too small and mixed in too great a quantity to be separated by handpicking. Handpicking relies on distinct size, colour, or shape differences.
❓ Frequently Asked Questions
What is covered in CBSE Class 6 Science Chapter 9 Methods of Separation in Everyday Life?
This chapter covers all key topics from Methods of Separation in Everyday Life as per CBSE 2026-27 syllabus.
Is this Assertion & Reason useful for CBSE board exams?
Yes, designed for CBSE Class 6 board exam preparation covering the complete syllabus.
Are these CBSE Class 6 Science Assertion & Reason updated for 2026-27?
Yes, all content at eBookPublisher is updated as per the latest 2026-27 CBSE syllabus.
How many chapters are in CBSE Class 6 Science?
All chapters of CBSE Class 6 Science are covered at eBookPublisher with free Assertion & Reason for each chapter.
Can I study Methods of Separation in Everyday Life online for free?
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