When an Incense Stick (Agarbatti) is Lighted in One Corner of a Room, Its Fragrance Spreads in the Whole Room Quickly. Which Characteristic of the Particles of Matter is Illustrated by this - Science

Short Note

When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?



The spreading of fragrance of incense stick from a corner to the whole room indicates that particles of matter keep moving from higher to lower concentration.

  Is there an error in this question or solution?
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 6 | 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.

A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?

What are the characteristics of particles of matter?

Fill in the blank:

The change of a solid into a liquid is called melting or................

Water cycle is an example of inter conversion of states of water. Explain.

Define the following term.


How will you prove by an experiment that solids occupy space ?

Fill in the blank:

Any matter which has a definite.................... but no definite shape is called a...............

Write whether the following statement is true or false.
Solids have the largest inter-molecular space.

Write true or false for statement. Rewrite the false statement correctly.

Solids and liquids can flow.

For the following statement, say whether it describes a solid, a liquid or a gas.
 Particles move about very quickly.

Give two examples of the following:

Substances which are rigid and not compressible.

If an object is taken to the moon from the earth what will be its mass ?

Give reason of Liquids have definite volume but no difinite shape.

Fill in the blank

Molecules in a ________ are packed very closely.

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

Even two or three crystals of potassium permanganate can impart colour to a very large volume of water. Which characteristic of particles of matter is illustrated by this observation?

A piece of chalk can be broken into small particles by hammering but a piece of iron cannot be taken into small particles by hammering. Which characteristic of the particles of matter is illustrated by these observations?

Which one of the following statements is not true?

  1. the molecules in a solid vibrate about a fixed position
  2. the molecules in a liquid are arranged in a regular pattern
  3. the molecules in a gas exert negligibly small forces on each other, except during collisions
  4. the molecules of a gas occupy all the space available

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 ____

Define the Gas and give two examples.

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

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.

Match the characteristics of the three states of matter in List I with their correct answer from List II.

List I List II
1. Have no definite shape, volume or free surface A: Solids only
2. Are highly compressible and least rigid B: Liquids only
3. Have a definite volume, no definite shape and are slightly diffusable C: Gases only
4. Are not compressible and have no diffusability D: Liquids and gases only
5. Have mass and occupy space E: Solids and gases only
  F: Solids, liquids and gases

Fill in the blanks:

Matter is defined as anything that occupies _______ and has _______

Fill in the blank:

Particles in a gas possess ___________ kinetic energy.

Give a reason for the following:

Liquids have one free upper surface only.

Give the reason for the following 

Particles of matter move more rapidly on the application of heat.

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.

The property to flow is unique to fluids. Which one of the following statements is correct?


      Forgot password?
Use app×