DAV Class 6 Science Chapter 3 Solution

DAV Class 6 Science Chapter 3 Solution: If you are looking for the solution of DAV class 6 Science Chapter 3 Nature of Matter, then you are at right place. Here we provide complete solution of DAV class six The Living World science book.

DAV Class 6 Science Chapter 3 Solution

Highlights

• A. Fill in the blanks.
• B. True or False.
• C. Tick the correct option.
• D. Answer the following questions in brief.
• E. Answer the following questions.

A. Fill in the blanks.

1. The process of grouping objects with similar properties is called ___________.

2. Anything that occupies ___________ and has ___________ is called matter.

3. In the ___________ state of matter, the constituent particles have very little hold on one another.

4. Light does not pass through a blackboard as it is an ___________ object.

5. Smell of a perfume reaches us by the process of ___________.

Answer: (1) classification (2) space, mass (3) gases (4) opaque (5) diffusion

B. Write True or False for the following statements.

1. Air is a man-made material.

2. A thin polythene sheet is transparent.

3. Pebbles float on water.

4. Diffusion is the mixing of the particles of two materials, on their own.

5. Oxygen gas is slightly soluble in water.

Answer: (1) False (2) True (3) False (4) True (5) True

C. Tick the correct option.

Answer:

1. solids only

2. occupies space and has some mass.

3. a piece of wood

4. gas in another gas.

5. mustard oil

D. Answer the following questions in brief.

1. Define the following:

(a) Natural materials.

(b) Transparent materials

2. Name any three materials that are (i) transparent (ii) opaque in nature.

3. Which state of matter (i) can (ii) cannot easily change its shape and volume? Why?

Answer:

(1) gaseous state of matter can easily change its shape and volume because its particles are not tightly packed with each other so, they can move.

(2) Solid state of matter cannot change its shape and volume because its particles are very tightly packed with each other and cannot move. So, they cannot change its shape and volume easily.

4. Why do materials diffuse into each other?

Answer: The property of mixing of particles, of two materials, on their own, is called diffusion. This happens due to the free movement of the particles of such materials

5. Define the term ‘solubility’. How does it change on increasing the temperature of water?

Answer: maximum amount of a substance that can be dissolved in a given volume, of a given liquid (usually water).

Solubility of substance increases with increasing the temperature of water.

6. Name three materials that are (i) soluble (ii) insoluble in water.

Answer:

(1) sugar, salt, ink.

(2) sand, paper, oil

E. Answer the following questions.

1. Why do solids have a fixed shape and a definite volume?

Answer: Solids have a fixed shape and a definite volume because, in solids, the particles are very tightly packed with each other and cannot move Hence, solids have a fixed shape and a definite volume.

2. Briefly describe an activity to show that pure water is a transparent liquid.

Answer:

Take a beaker half-filled with clean water. Put a coin in beaker of water. Place the beaker undisturbed for a few minutes where enough light is present. Now, observe the coin immersed in water from the top of the beaker. Are you able to see the coin? You can clearly see the coin immersed in water. This proves that water is a transparent liquid.

3. Describe an activity to show that a solid can diffuse slowly into a liquid.

Answer:

Take some clean water in a beaker and place the beaker on the table where enough light is present. Drop a few crystals of potassium permanganate in water. Observe the water carefully. You will see that pink colour spread slowly in water. This shows diffusion of a solid in a liquid.

4. What is a ‘saturated solution’? How can one prepare a saturated solution of common salt in water?

Answer:

solution, in which more of the given substance, cannot be dissolved at a given temperature such solution is called saturated solution.

To prepare saturated solution of common salt in water follow these steps–

Take a glass tumbler half-filled water. Add half teaspoon of salt in it and stir well. The salt dissolves. Now, add another half teaspoon of salt and stir. This will also dissolve.

Keep on adding salt in half teaspoon amounts and stir well after every addition.

After adding a particular amount of salt, you will observe that salt is no more dissolving in the given volume of water.

The solution obtained in the above activity cannot dissolve more salt. Such a solution which cannot dissolve more amount of a given substance at a given temperature is called a saturated solution.

5. Suggest one activity to show the effect of temperature on the solubility of a solid in water.

Answer:

Take equal volume of water in two separate glass tumblers. Heat the water in one of the tumblers. Now, add equal amounts of sugar in two tumblers and stir. The sugar dissolves. Keep on adding measured amounts of sugar in two tumblers till it stops dissolving.

Find out in which tumbler more amount of sugar has got dissolved You will find that the amount of sugar dissolved in hot water is more.

Important topics covered in DAV Class 6 Science Chapter 3 Solution – Nature of Matter

• 1. Matter
• 2. Constitution of Matter
• 3. Properties of Matter
• 4. Dissolution of Liquids in Water
• 5. Dissolution of Gases in Water

Students can utilise the DAV Class 6 Science Chapter 3 Solution for any quick references to comprehend these and other complex topics.

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