Class 5 Science Chapter 8 Properties of Water Solutions

CHAPTER - 8

Properties of Water

EXERCISE

(Question/Answer)

Highlights

(i) Fill in the blanks.

(ii) Write True or False for the following statements.

(iii) Tick the correct option

(iv) Answer the following questions in brief.

(v) Answer the following questions.

Fill in the blanks

( Exercise )

1. A substance which dissolves completely in a liquid is said to be ___________ in it.

2.The substance, that dissolves in a medium to form a solution, is known as the ___________.

3. Mustard oil is ___________ in water.

4. Aquatic animals breathe the ___________ gas dissolved in water.

5.Change of a liquid into its vapour form is called _.
6. Condensation is the process of change of vapours into _.

Answer

(1) soluble

(2) solute

(3) insoluble

(4) oxygen

(5) evaporation

(6) liquids.

Write True or False for the following statements.

( Exercise )

1. Sugar and salt are soluble in water.

2. Hair oil is insoluble in water.

3. Pebbles float on water.
4. Sand sinks in water.
5 Water vapours can be changed into liquid water by heating.

Answers

(1) True

(2) True

(3) False

(4) True

(5) False.

Tick the correct option.

( Exercise )

1. In a solution of sugar and water-

2. When sand is mixed with water, it –

3. Wet clothes get dried due to-
4. Mixture of sugar, salt and lemon juice in water is a-

Answer

(i) water is the solvent.

(ii) does not dissolve but sinks in water.

(iii) evaporation

(iv) solution

Answer the following questions in brief.

( Exercise )

1. Define a solution.

Answer: Mixture formed when a substance dissolves completely in any medium.

2. What is a solvent?

Answer: The medium in which a substance is dissolved to form a solution.

3. Name two substances that are soluble in water.

Answer: Salt and sugar.

4. Name two substances that are insoluble in water.

Answer: Sand and coin.

…………………………………………………….

5. Write the names of four substances that float on water.

Answer: Cork, butter paper, thermocole, and hair oil.

…………………………………………………….

6. Name the three forms of water.

Answer: the three forms of water are:

Ice
Water
Water vapour

Answer the following questions.

( Exercise )

1. Give two examples each of:

(a) liquids which dissolve in water.

Answer: lemon juice and milk.

(b) liquids which are insoluble in water.

Answer: hair oils and diesel.

(c) solids which float on water.

Answer: thermocole and cork.

(d) solids which sink in water.

Answer: coins and iron nails.

2. What do we understand by the term’s ‘evaporation’ and ‘condensation’?

Answer: Evaporation – change of a liquid into its vapour form is called evaporation.

Condensation – change of vapour form of a substance into its liquid form on cooling is called condensation.

3. How are clouds formed?

Answer: Water from oceans, seas and rivers, changes into vapour as it evaporates due to the heat of the sun. These water vapours rise up. As these go very high, they get cooled and condense to form tiny droplets of liquid water. In this way, clouds are formed.

4. How does rain water get impure?

Answer: Raindrops, when just formed, are the purest form of water. By the time they reach the surface of the earth, they become impure, because they dissolve many harmful gases present in air and also get dust and smoke mixed up with them.

5. Draw a diagram showing the water cycle.

Answer:

CHAPTER - 8

Properties of Water

EXERCISE

(Question/Answer)

Highlights

(i) Fill in the blanks.

(ii) Write True or False for the following statements.

(iii) Tick the correct option

(iv) Answer the following questions in brief.

(v) Answer the following questions.

Fill in the blanks

( Exercise )

1. A substance which dissolves completely in a liquid is said to be ___________ in it.

2.The substance, that dissolves in a medium to form a solution, is known as the ___________.

3. Mustard oil is ___________ in water.

4. Aquatic animals breathe the ___________ gas dissolved in water.

5.Change of a liquid into its vapour form is called ___________. 6. Condensation is the process of change of vapours into ___________.

Answer

Write True or False for the following statements.

( Exercise )

1. Sugar and salt are soluble in water.

2. Hair oil is insoluble in water.

3. Pebbles float on water. 4. Sand sinks in water. 5 Water vapours can be changed into liquid water by heating.

Answers

Tick the correct option.

( Exercise )

1. In a solution of sugar and water-

2. When sand is mixed with water, it –

3. Wet clothes get dried due to- 4. Mixture of sugar, salt and lemon juice in water is a-

Answer

Answer the following questions in brief.

( Exercise )

1. Define a solution.

2. What is a solvent?

3. Name two substances that are soluble in water.

4. Name two substances that are insoluble in water.

Answer the following questions.

( Exercise )

1. Give two examples each of:

2. What do we understand by the term’s ‘evaporation’ and ‘condensation’?

3. How are clouds formed?

4. How does rain water get impure?

5. Draw a diagram showing the water cycle.

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5.Change of a liquid into its vapour form is called _.
6. Condensation is the process of change of vapours into _.

3. Pebbles float on water.
4. Sand sinks in water.
5 Water vapours can be changed into liquid water by heating.

3. Wet clothes get dried due to-
4. Mixture of sugar, salt and lemon juice in water is a-