569- SCERT-BASIC SCIENCE-CHAPTER 9-MIX AND SEPERATE

Multiple Choice

1. The smallest particle of a substance retaining all the properties of that substance is known as its

• Molecule

• Substances

• Winnowing

• Solution

​A molecule is the tiniest particle of a material (element or compound) that has all of that substance's attributes and can live on its own.

Multiple Choice

2. Consider the following statements:

1. Substances that exist in the solid, liquid and gaseous states are made up of molecules

2.Hand picking is the method to separate rice from pulses

Which of the statements given above is/are correct?

• 1 only

• 2 only

• Both 1 and 2

• Neither 1 nor 2

​

·    Substances that exist in the solid, liquid and gaseous states are made up of molecule

·    Hand picking is the method to separate rice from pulses

 

Multiple Choice

3. If substances contain only one type of molecules it is known as

• Atom

• Pure substance

• Molecule

• Heterogeneous substance

​If a substances contains only one type of  molecules it is known as pure substances

Multiple Choice

4. Which of the following are pure substances?

1. Water

2. Salt

3. Baking soda

 

Select the correct answer using the code given below

• 1 and 2

• 2 only

• 2 and 3

• 1,2 and 3

​

Water, salt and baking soda are pure substances

Multiple Choice

5. If there are more than one type of molecule present in the substances, is called

• Pure substances

• Atom

• Mixture

• Molecule

​

If there are more than one type of molecule present in the substances, is called mixture

Multiple Choice

6. Which of the following are pure substances?

1. Oxygen

2. Mercury

3. Iron

4. Copper sulphate

Select the correct answer using the code given below

• 1 and 2

• 2 and 3

• 1, 2 and 3

• All of the above

​Oxygen, Mercury, Iron, Copper sulphate are pure substances

Multiple Choice

7. Which of the following are the examples of mixture?

1. Sugar solution

2. Soda

3. Air

4.Pure water

Select the correct answer using the code given below

• 1 and 2

• 2 and 3

• 1, 2 and 3

• All of the above

​

Examples of mixture

·    Sugar solution

·    Soda

·     Air

·    pure water

Multiple Choice

8. If a mixture exhibits the same property throughout that mixture is called

• Heterogeneous mixture

• Homogeneous mixture

• Pure substances

• All of the above

​

If a mixture exhibits the same property throughout that mixture is called homogeneous mixture

Multiple Choice

9. Consider the following statements:

1. Salt water is an important heterogeneous mixture

2. Chalk powder dissolved in water is an example of homogeneous mixture

Which of the statements given above is/are correct?

• 1 only

• 2 only

• Neither 1 nor 2

• Both 1 and 2

  Salt water is an important homogeneous mixture

·    Chalk powder dissolved in water is an example of heterogeneous mixture

​

Multiple Choice

10. If a mixture exhibits different properties in different parts, that mixture is called

• Homogeneous mixture

• Heterogeneous mixture

• Pure substance

• None of the above

If a mixture exhibits different properties in different parts, that mixture is called Heterogeneous mixture

Multiple Choice

11. The process of separating the clear liquid above after sedimentation of the component of the mixture is called

• Magnetic separation

• Decantation

• Winnowing

• None of the above

The process of separating the clear liquid above after sedimentation of the component of the mixture is called Decantation

 

Multiple Choice

12. The process of separating the constituent particles of a mixture using a sieve is called

• Filtration

• Winnowing

• Magnetic separation

• Straining

​

The process of separating the constituent particles of a mixture using a sieve is called filtration

Multiple Choice

13. Which of the statements given above is/are correct?

1.Evaporation is the process by which liquid absorbs heat and get converted in to water

2. Tea can be separated from. The leaves by filtration

 

Which of the statements given above is/are correct?

• 1only

• 2 only

• Both 1 and 2

• Neither 1 nor 2

·    Evaporation is the process by which liquid absorbs heat and get converted in to water

·    Tea can be separated from. The leaves by filtration

Multiple Choice

14. Consider the following statements:

1. Water is a pure substance

2. Only sugar molecule is present in the sugar candy

Which of the statements given above is/are not correct?

• 1 only

• 2 only

• Both 1 and 2

• Neither 1 nor 2

​

• Water is a pure substance

• ..Only sugar molecule is present in the sugar candy

Multiple Choice

15. Consider the following paires of substances and molecule present in it

1. Sugar solution: sugar and water

2. Soda water: Carbon and oxygen

3. Air: water vapour and carbon dioxide

Which of the pair given above is/are correct?

• 1 and 2

• 2 and 3

• 1,2 and 3

• 1 and 3

·    Sugar solution: sugar and water

·     Soda water; Carbon and oxygen

·    Air: water vapour and carbon dioxide

 

Multiple Choice

16. Consider the following statements:

1. Oxygen and mercury are examples of pure substances

2. Lemon juice and Sambharam are homogeneous mixture

Which of the statements given above is/are correct?

• 1 only

• 2 only

• Both 1 and 2

• Neither 1 nor 2

·    Oxygen and mercury are examples of pure substances

·    Lemon juice and Sambharam are heterogeneous mixture

Multiple Choice

17. Consider the following statements

1. Most of the solutions that we use are those in which a solid substances is dissolved in liquid

2. All solutions always  exist in liquid state

3. Solution also exist in solid and gashouse states

Which of the statements given above is/are correct?

• 1 and 2

• 1 and 3

• 1,2 and 3

• 2 and 3

    Most of the solutions that we use are those in which a solid substances is dissolved in liquid

·    All solution do not exist in liquid state

·    Solution also exist in solid and gashouse states

Multiple Choice

18. Which of the following are the methods of separating the components from mixture?

1. Filtration

2. Evaporation

3. Magnetic separation

4.Handpicking

Select the correct answer using the code given below

• 1 and 2

• 2 and 3

• 1, 2 and 3

• All of the above

​Methods of separateing the components from mixture

1. Filtration

2. Evaporation

3. Magnetic separation

4. Hand picking

Multiple Choice

19. What method can be used to   separate the mixture of wax powder and iron?

• Winnowing

• Magnetic separation

• Hand Picking

• Straining

​Magnetic separation can be used to   separate the mixture of wax powder and iron

Multiple Choice

20. Consider the following statements:

1.Sieving is used to separate solid materials of different size

2.Threshing is used to separate heavier and lighter component of a mixture

Which of the statements given above is/are correct?

• 1 only

• 2 only

• Both 1 and 2

• Neither 1 not 2

​   Sieving is used to separate solid materials of different size

·    Winnowing is used to separate heavier and lighter component of a mixture

Multiple Choice

21. Using which equipment will you get water with maximum purity while filtering muddy water?

• Cloth

• Filter paper

• Tea strainer

• Magnet

Filter paper can be used to

get water with maximum purity while filtering muddy water

Multiple Choice

22. Consider the following statements:

1. Pure water is a pure substances, it contain only molecules of water

2. Sugar solution is a mixture which contains molecules of water and sugar

Which of the statements given above is/are correct?

• 1 only

• 2 only

• Both 1 and 2

• Neither 1 nor 2

·    Pure water is a pure substances, it contain only molecules of water

·     Sugar solution is a mixture which contains molecules of water and sugar

 

Multiple Choice

23. Consider the following statements:

 1. The process of separating solid particles from a liquid by passing through a filter

Is called filtration

2. Separating tea dust from tea is an example of winnowing

Which of the statements given above is/are correct?

• 1 only

• 2 only

• Both 1 and 2

• Neither 1 nor 2

·    The separation of solid particles from a liquid by passing it through a filter. It is known as filtration.

·     Filtration is used to separate tea dust from tea.

Multiple Choice

24. The process of separating heavier and lighter component of a mixture by wind or blowing air is known as

• Hand picking

• Filtration

• winnowing

• None of the above

​The process of separating heavier and lighter component of a mixture by wind or blowing air is known as winnowing

Multiple Choice

25. Which of the following methods used by farmers to separate rice husk particles from heavier seeds of grain?

• Magnetic separation

• Winnowing

• Filtration

• straining

Winnowing  is a methods used by farmers to separate rice husk particles from heavier seeds of grain

 

Multiple Choice

26. Which of the following  can be separated in to constituents through evaporation?

1. Salt water can be separated from salt.

2. Separation of sugar from sugar solution

3. Jiggery derived from jiggery solution

 

Select the correct answer using the code given below

• 1 and 2

• 2 and 3

• 1,2 and 3

• 1 and 3

Constituents separated through evaporation

·    Salt water can be separated from salt.

·     Separation of sugar from sugar solution

·    Jiggery derived from jiggery solution

 

Multiple Choice

27. The process of separating components of mixture by using magnets to attract magnetic materials is called

• Winnowing

• Filtration

• Magnetic separation

• Distillation

The process of separating components of mixture by using magnets to attract magnetic materials is called magnetic separation

Multiple Choice

28. Consider the following statements:

1. By magnetic separation we can separate iron powder from aluminum powder

2. Sand is good sieve; it filtered all the dirt and water become clearer.

Which of the statements given above is/are correct?

• 1 only

• 2 only

• Both 1 and 2

• Neither 1 nor 2

By magnetic separation we can separate iron powder from aluminum powder

·    Sand is good sieve; it filtered all the dirt and water become clearer.

 

Multiple Choice

29. Consider the following statements:

1. Pottasium permanganate is an example of pure substance

2.In magnetic separation magnetic property of iron used for this

3. We will use sedimentation  method to separate sand from water

Which of the statements given above is/are correct?

 

• 1 and 2

• 2 and 3

• 1, 2 and 3

• 1 and 3

·    Potassium permanganate is an example of pure substance

·    In magnetic separation magnetic property of iron used for this

·    We will use sedimentation  method to separate sand from water

 

Multiple Choice

30. Which of the following are the constituent of air?

1. Nitrogen

2. Oxygen

3. Carbon dioxide

4.Copper

Which of the statements given above is/are correct?

• 1 and 2

• 2 and 3

• 1, 2 and 3

• All of the above

​Nitrogen is the most abundant element in air. Air is composed of nitrogen,  oxygen, and  other gases, dust, impurities, and water vapour