State the Term Which Refers to the Conversion of a Substance on Heating From. Solid-state to Liquid State Liquid State to Vapour State Vapour State to Liquid State Liquid State to Solid-state. - Chemistry

One Word Answer

State the term which refers to the conversion of a substance on heating from.

  1. solid-state to liquid state
  2. liquid state to vapour state
  3. vapour state to liquid state
  4. liquid state to solid-state.


The terms which refer to the conversion of a substance are:

  1. Melting
  2. Vaporisation
  3. Liquefaction
  4. Solidification
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Chapter 1: Matter and Its Composition - Exercise


Viraf J. Dalal Class 7 New Simplified Middle School Chemistry
Chapter 1 Matter and Its Composition
Exercise | Q 12.2


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.

What are the characteristics of particles of matter?

Fill in the blank:

The change of water vapour into water is called ......................

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

Define the following terms.


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

Give reason:
A red ink drop added to small amount of water in a glass turns water red in some time.

Fill in the blank:

..............can flow

Name the phenomenon which cause the following change:

Formation of water vapour from water.

The state of matter which has no definite shape or volume is called

  1. solid
  2. liquid
  3. gas
  4. water

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:

A drop of ink added to water in a glass turns whole water blue.

Fill in the blank:

The quantity of matter in an object is called its _____

What happens when a solid is heated ?

Give reason Liquids can flow easily 

Give reason of We can walk through air.

Fill in the blank

The molecules are at a greater distance in ______ compared to liquids.

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

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

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?

Which of the following statement is incorrect?

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.

When a beam of sunlight enters a room through a window, we can see tiny particles X suspended in a gas (or rather a mixture of gases) Y which are moving rapidly in a very haphazard manner.

  1. What could particles X be ?
  2. Name the gas (or mixture of gases) Y.
  3. What is the phenomenon exhibited by particles X known as ?
  4. What is causing the movement of particles X ?
  5. What conclusion does the existence of this phenomenon give us about the nature of matter ?

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 Liquid and give two examples.

State in which of the three states of matter:

The space between the particles is minimum.

Give a reason why –

Gases have no definite volume and no definite shape.

Fill in the blanks:

Matter is defined as anything that occupies _______ and has _______

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

State why the inter-particles attraction decreases to negligible.

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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