When Sugar is Dissolved in Water, There is No Increase in the Volume. Which Characteristic of Matter is Illustrated by this Observation? - Science

Short Note

When sugar is dissolved in water, there is no increase in the volume. Which characteristic of matter is illustrated by this observation?



The absence of increase in volume of water on dissolution of sugar into it, describes the following characteristics of matter:

  1. Matter is made up of very, very small particles.
  2. Particles of matter have spaces between them.
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Chapter 1: Matter in Our Surroundings - Very Short Answers [Page 17]


Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 1 Matter in Our Surroundings
Very Short Answers | Q 4 | Page 17


Which of the following are matter?

Chair, air, love, smell, hate, almonds, thought, cold, cold drink, smell of perfume.

Give reasons for the following observation:

The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.

Give two example of the following:

The substances which do not change their state on heating.

How a liquid changes into its gaseous state ? Explain ?

Write your observation and conclusion for the following.

When a small stone is gently dipped into a glass filled with water.

Write whether the following statement is true or false.
All solids, on heating, first change to the liquid and then to the gaseous state always.

Write whether the following statement  is true or false.
The intermolecular force of attraction is the weakest in gases.

For the following statement, say whether it describe a solid, a liquid or a gas.
 Particles are quite close together.

All kinds of matter

  1. occupy space and have definite mass
  2. have mass and definite shape
  3. can change their states
  4. have definite volume

A solid is a state of matter that has

  1. no definite shape.
  2. large intermolecuiar space.
  3. high intermolecuiar force of attraction.
  4. no definite volume.

Give reason Liquids can flow easily 

Define the following term of Molecule .

Write your observation and conclusion for the following,

When a small stone is gently dipped into a glass filled with water.

Give reason of The odour of scent spreads in a room.

Give an experiment to explain that there are intermolecular spaces between water molecules.

Which single term is used to describe the mixing of copper sulphate and water kept in a beaker, on its own?

Fill in the following blank with suitable words :

The smell of perfume gradually spreads across a room due to .....................

State two characteristics of matter demonstrated by diffusion.

Explain why, we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert.

What is meant by 'diffusion'? Give one example of diffusion in gases.

Which one of the following statement is correct in respect of fluids?

Bromine particles are almost twice as heavy as chlorine particles. Which gas will diffuse faster; bromine (vapour) or chlorine? Explain your answer.

Define: diffusion

 Define: interconversion of states of matter.

What are the two conditions for the interconversion of states of matter?

Give reasons for the following:

Solids have a definite shape and are highly rigid while gases have to definite shape and are least rigid.

Give reasons for the following:

Sugar can be distinguished from talcum powder using water.

Give reasons for the following:

Water on freezing turns into ice.

Give reasons for the following:

A bottle of perfume on opening evolves an odour which can be sensed over a long distance.

Complete the statement given below by selecting the correct word.

The space between atoms in gases is maximum while in ____ is minimum,

Fill in the blank with the correct word Given below.

The space between atoms’ [molecules] of solids is ____

Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to shape.

Differentiate the general properties of solids, liquids and gases in the form of a table — with reference to free diffusion.

State in which of the three states of matter:

The movement of the particles is neither about their own positions nor in any random direction.

Give a reason why –

Liquids have a definite volume but no definite shape.

Give a reason why solids and liquids co-exist at their melting points.

In which of the three states of matter – solids, liquids, or gases is the movement of atoms about their own position. Give a reason for the same.

With reference to the liquid state of matter – answer the following

How does the stored energy, have an effect on inter-particles space.

200 ml of water is poured into a bowl of 400 ml capacity. The volume of water will be ______.

Among the following ______ is not a mixture.

Water obtained from tube wells is usually ______ water.

Air is not compressible.

Match the following.

Property Example
Breaks easily (Brittle) Metal pan
Bends readily Rubber band
Can be stretched easily Cotton wool
Gets compressed easily Mud pot
Gets heated readily Plastic wire

Mr. Raghu returns home on a hot summer day and wants to have buttermilk. Mrs. Raghu has the only curd. What can she do to get buttermilk? Explain

In a glass containing some water, tamarind juice and sugar are added and stirred well. Is this a mixture? Can you tell why? Will this solution be sweet or sour or both sweet and sour?

Which one of the following element name is not derived from planet?

The Cow and Birds are nonliving things.

Mention any two characteristics of the particles of matter.

You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labelled diagram.


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