What Are the Two Conditions for the Interconversion of States of Matter ? - Chemistry


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



Two conditions are: change in
(i) Temperature (ii) Pressure

  Is there an error in this question or solution?


Which of the following are matter?

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

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

Fill in the blank:

The temperature at which a liquid starts changing into its vapour state is ______.

Why can a piece of chalk be broken easily into smaller pieces while a coal piece cannot be broken easily?

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

Give reason for the following.

Pure substances have fixed melting or boiling points.

 Give reason:
When an empty gas jar is inverted over a gas jar containing a coloured gas, the gas also spreads into the empty jar.

Write whether the following statement is true or false.
If the container in which a gas is collected has an opening, the gas will flow out and spread itself indefinitely.

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

For the following statement, say whether it describes a solid, a liquid or a gas.
Particles are far apart and move in all directions.

Name the phenomenon which cause the following change:

Formation of water vapour from water.

Give two examples of the following:

Substances which are rigid and not compressible.

What is mass ?

Why liquids do not have a definite shape ?

Give reason Liquids can flow easily 

Give reason of We can walk through air.

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

Write whether the following statement are true or false.

Intermolecular force of attraction is greater in gases than in liquids.

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

If the intermolecular space is more than the intermolecular force will be weaker.

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?

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?

What is the general name of :

  1. rigid form of matter ?
  2. fluid forms of matter ?

Fill in the following blank with suitable words :

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

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.

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

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 Solid and give two examples.

Give a reason why –

Liquids have a definite volume but no definite shape.

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.

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.


      Forgot password?
Use app×