How are grain seeds removed from their stalks?
- ASieving.
- BWinnowing.
- ✓Threshing.
- DAll of the above.
Answer: C.
View full solution →Question types
Separation of Substances question types
358 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
358
Questions
9
Question groups
5
Question types
01
[1 Marks Each] M.C.Q.
181 Q→02Assertion (A) & Reason (B) MCQ
7 Q→03[1 Marks Each] Blanks
23 Q→04True Or False.[1 Marks Each]
25 Q→05[1 Marks Each] QUE - ANS
82 Q→06[3 Marks Each] QUE-ANS
15 Q→07[5 Marks Each] QUE-ANS
8 Q→08case /data -based (4 Marks)
5 Q→09Answer The Following Questions In Short.[2 Marks Each]
12 Q→Sample Questions
Separation of Substances questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
While preparing chapatis, Paheli found that the flour to be used was mixed with wheat grains. Which out of the following is the most suitable method to separate the grains from the flour?
- AThreshing.
- ✓Sieving.
- CWinnowing.
- DFiltration.
Answer: B.
View full solution →Which method is used to separate heavier and lighter components in a mixture by wind?
- AHand picking.
- BThreshing.
- ✓Winnowing.
- DSieving.
Answer: C.
View full solution →$X$ is a separation technique used only when the components of a solid-solid mixture have different sizes. Identify $X.$
- AWinnowing.
- ✓Sieving.
- CThreshing.
- DMagnetic separation.
Answer: B.
View full solution →Direction: Read the passages given below and answer the questions that follow. Passage. Mohan's Mother bought rice from market. Before cooking rice Mohan and his mother observed that rice contains impurities such as pebbles, husk and chaff in it. Mohan said that he will not eat these rice as it contain various impurities. But his mother told him that before cooking these impurities are removed by different methods. Which process is used for separation of husk and chaff from rice?
- AWinnowing.
- BSedimentation.
- CSieving.
- ✓Both $(a)$ and $(b).$
Answer: D.
View full solution →Assertion – for separation of heavier and lighter components of a mixture by wind or by blowing air.
Reason – The process which is used to separate rain from stalks are known as winnowing.
Reason – The process which is used to separate rain from stalks are known as winnowing.
- AAssertion and reason both are correct statement and reason is correct explanation for assertion.
- BAssertion and reason both are correct statement and reason is not correct explanation for assertion.
- ✓Assertion is correct statement but reason is wrong statement.
- DAssertion is wrong statement but reason is correct statement.
Answer: C.
View full solution →Assertion – when the heavier component in a mix settles after water is added to it the process is called sedimentation. Reason – when the water along with the dust is removed the process called decantation.
- AAssertion and reason both are correct statement and reason is correct explanation for assertion.
- ✓Assertion and reason both are correct statement and reason is not correct explanation for assertion.
- CAssertion is correct statement but reason is wrong statement.
- DAssertion is wrong statement but reason is correct statement.
Answer: B.
View full solution →Assertion – evaporation can be used to separate a solid dissolved in a liquid. Reason- Evaporation is the process in which liquid gets converted into it’s vapour.
- ✓Assertion and reason both are correct statement and reason is correct explanation for assertion.
- BAssertion and reason both are correct statement and reason is not correct explanation for assertion.
- CAssertion is correct statement but reason is wrong statement.
- DAssertion is wrong statement but reason is correct statement.
Answer: A.
View full solution →Assertion- Separation of stones from rice is one of the separation method. Reason – The above separation method is handpicking method of separation.
- ✓Assertion and reason both are correct statement and reason is correct explanation for assertion.
- BAssertion and reason both are correct statement and reason is not correct explanation for assertion.
- CAssertion is correct statement but reason is wrong statement.
- DAssertion is wrong statement but reason is correct statement.
Answer: A.
View full solution →DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion and the other labelled as "Reason $R$ ". You are to examine these two statements carefully and decide if he Assertion $A$ and Reason $R$ are individually true and if so, whether the reason is a correct explanation if the assertion. Select one of the current options, and given below in each questions.
Assertion A: The process of settling of heavier insoluble particles from a suspension of a substance in water known as decantation.
Reason R: This process along with sedimentation is used to get clear water from muddy water.
Assertion A: The process of settling of heavier insoluble particles from a suspension of a substance in water known as decantation.
Reason R: This process along with sedimentation is used to get clear water from muddy water.
- ABoth $A$ and $R$ are true and $R$ is the correct explanation of $A$
- BBoth $A$ and $R$ are true but $R$ is not the correct explanation of $A$
- ✓$A$ is true but $R$ is false
- D$A$ is false but $R$ is true
Answer: C.
View full solution →Fill in the blanks with appropriate words:
Sugarcane juice is a mixture of ______ water and many other substances.
Sugarcane juice is a mixture of ______ water and many other substances.
The two liquids that do not mix with each other can be separated by $..........$
View full solution →The method by which impurities and bran can be removed from the flour is $..........$
View full solution →The technique that separates a liquid from insoluble solid by carefully pouring off the liquid is called $..........$
View full solution →Fill in the blanks with appropriate words:
Butter is a component of $.........$
View full solution →Butter is a component of $.........$
Evaporation can be used to separate a solid dissolved in liquid. True/ False.
Water and milk are mixed in a glass. This mixture can be separated by filtration. True/ False.
Milk is a mixture. True/ False
Mixture has properties different from its components. True/ False
Heavier and lighter components of a mixture can be separated by winnowing. True/ False.
Does the water dissolve equal amount of different soluble substances?
Fill in the blanks with appropriate words:
Small pieces of stone can be removed from rice by __________.
Small pieces of stone can be removed from rice by __________.
Fill in the blanks with appropriate words:
Husk from wheat flour is generally removed by ___________.
Husk from wheat flour is generally removed by ___________.
State whether the following statements are true or false.
A mixture of tea leaves and milk can be separated by decantation.
A mixture of tea leaves and milk can be separated by decantation.
State whether the following statements are true or false.
A mixture of iron filings and rice flour can be separated by magnet.
A mixture of iron filings and rice flour can be separated by magnet.
How will you separate sand and water from their mixture?
Mention the methods that can be used for the separation of the following mixtures:
- Wheat, sugar and husk
- Rice, gram and iron fillings
- Sand, Mack gram (urad) and husk.
Activity.Take two glasses and pour half a cup of water in each of them. Add a teaspoon of salt to one glass and stir till the salt dissolves. Go on adding salt, one teaspoon at a time, till the solution saturates. Record the number of spoons of salt that dissolved in the water, in Table. Now, repeat the same activity with sugar. Repeat this with some other substances that are soluble in water.
What do you notice from Table? Do you find that water dissolves different substances in different amounts?
What do you notice from Table? Do you find that water dissolves different substances in different amounts?
Name the steps and methods you will use to separate the following:
- Coconut oil, salt and water.
- Chalk powder, water and stones.
- Iron filings, sand and salt.
What is the importance of centrifugation? How is it done?
Read the story titled $\text{“WISE FARMER”}$ and tick the correct option to complete the story.
A farmer was,
View full solution →A farmer was,
- Sad/ happy to see his healthy wheat crop ready for harvest. He harvested the crops and left it under the.
- Sun/ rain to dry the stalks. To separate the seeds from the bundles of the stalk he.
- Handpicked/ threshed them. After gathering the seed grains, he wanted to separate the stones and husk from it. His wife.
- Winnowed/ threshed them to separate the husk and later.
- Sieved/ handpicked to remove stones from it. She ground the wheat grains and.
- Sieved/ filtered the flour. The wise farmer and his wife got a good price for the flour.
How is common salt obtained from seawater?
How would you obtain clear water from a sample of muddy water?
Both Sarika and Mohan were asked to make salt solution. Sarika was given a teaspoonful of salt and half a glass of water, whereas Mohan was given twenty teaspoons full of salt and half a glass of water.
- How would they make salt solutions?
- Who would be able to prepare saturated solution?
Match the mixtures in Column $I$ with their method of separation in Column $II$.
View full solution →|
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$COLUMN\ I$
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$COLUMN\ II$
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$a$
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Oil mixed in water
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$i$
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Sieving
|
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$b$
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Iron powder mixed with flour
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$ii$
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Hand picking
|
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$c$
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Salt mixed with water
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$iii$
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Decantation
|
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$d$
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Lady's finger mixed with french beans
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$iii$
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Magnet
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$e$
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Rice flour mixed with kidney beans
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$iv$
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Evaporation
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$1 \ kg$ wheat grains are mixed with $1 \ kg$ mustard seeds.
$10.$ Write a suitable method to separate the mustard seeds from wheat grains.
View full solution →$10.$ Write a suitable method to separate the mustard seeds from wheat grains.
A beaker contains a mixture of salt, sand and water.
The mixture is iltered using ilter paper.
$8.$ What is substance $X$?
$9.$ Write a single separation method by which water can be separated from a mixture of salt, sand and water.
View full solution →The mixture is iltered using ilter paper.
$8.$ What is substance $X$?
$9.$ Write a single separation method by which water can be separated from a mixture of salt, sand and water.
Tea leaves are separated with a strainer while pouring tea.
$7.$ What property of tea leaves is used to separate them from the tea?
$7.$ What property of tea leaves is used to separate them from the tea?
- ✓Size
- BMass
- CShape
- DThickness
Answer: A.
View full solution →Anu adds sugar and salt to two separate glasses of water.
She stirs the mixture in each glass every time she adds salt or sugar to it.
She notes her indings in a table.
$3.$ What can Anu conclude from her activity?
$A.$ Sugar and salt dissolve equally in water.
$C.$ Stirring helps in dissolving all substances in a liquid.
$B.$ Sugar is more soluble than salt in water.
$D.$ Sugar forms a saturated solution in water but salt does not.
$4.$ Anu used two spoons of the same size to add sugar and salt to water.
What else did Anu need to keep the same for her activity?
$5.$ Anu repeats the activity using hot water.
Will the results in the table remain the same? Explain your answer
$6.$ Which of these processes could be used to separate the salt dissolved in the glass of water?
$A.$ Filtration
$B.$ Evaporation
$C.$ Condensation
$D.$ Sedimentation
View full solution →She stirs the mixture in each glass every time she adds salt or sugar to it.
She notes her indings in a table.
$3.$ What can Anu conclude from her activity?
$A.$ Sugar and salt dissolve equally in water.
$C.$ Stirring helps in dissolving all substances in a liquid.
$B.$ Sugar is more soluble than salt in water.
$D.$ Sugar forms a saturated solution in water but salt does not.
$4.$ Anu used two spoons of the same size to add sugar and salt to water.
What else did Anu need to keep the same for her activity?
$5.$ Anu repeats the activity using hot water.
Will the results in the table remain the same? Explain your answer
$6.$ Which of these processes could be used to separate the salt dissolved in the glass of water?
$A.$ Filtration
$B.$ Evaporation
$C.$ Condensation
$D.$ Sedimentation
Saroj collected muddy water from a pond.
He separated the water from the mud in three steps as shown in the pictures below.
$1.$ Which separation method did Saroj use at each step?
Select the correct row.
$2.$ Did Which of these properties did Saroj use to separate mud from water?
$A.$ Mud loats on water.
$B.$ Mud dissolves in water.
$C.$ Mud turns water cloudy.
$D.$ Mud is heavier than water.
View full solution →He separated the water from the mud in three steps as shown in the pictures below.
$1.$ Which separation method did Saroj use at each step?
Select the correct row.
| Step $1$ | Step $2$ | Step $3$ | |
| $A.$ | Evaporation | Sedimentation | Decantation |
| $B.$ | Sedimentation | Decantation | Filtration |
| $C.$ | Decantation | Sedimentation | Condensation |
| $D.$ | Sedimentation | Filtration | Decantation |
$A.$ Mud loats on water.
$B.$ Mud dissolves in water.
$C.$ Mud turns water cloudy.
$D.$ Mud is heavier than water.
Distinguish between the following:
Threshing and Winnowing.
Threshing and Winnowing.
Is it possible to separate sugar mixed with wheat flour? If yes, how will you do it?
How is common salt obtained from sea?
How will you Separate a mixture of common salt and chalk powder?
Why is separating different components of a mixture necessary?
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