How a Liquid Changes into Its Gaseous State ? Explain ? - Chemistry


How a liquid changes into its gaseous state ? Explain ?



As a liquid is heated, its particles starts gaining energy and move more vigorously which increases the gaps between the particles and decreasing the force of attraction. Ultimately a liquid changes into gaseous state.

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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?

What happens to water if it is heated and Explain the phenomenon of change of state of water.

Fill in the blank: 

The process in which a solid directly changes into a gas is called ....................

Classify the following into solids, liquids and gases.
Oxygen, milk, common salt, wax, stone, water vapour, carbon-dioxide, sugar, mercury, coal, blood, butter, copper, coconut oil, kerosene.

State the general properties of a solid.

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:

Liquids have no definite ............

Write whether the following statement is true or false.

 There is no difference between evaporation and boiling.

 The process by which a solid changes into a liquid is called

  1. freezing
  2. melting
  3. condensation
  4. evaporation

Give reason :
When a spoon is dipped in a glass containing some water the level of water rises but when a spoon of sugar is added to it and stired, the water level does not rise?

What is mass ?

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

Give reason of A gas fills up the space available to it.

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

There are large intermolecular gaps in

A solid is a state of matter that has

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?

Fill in the following blank with suitable words :

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

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

In which of the following conditions, the distance between the molecules of hydrogen gas would increase?

  1. increasing pressure on hydrogen contained in a closed container
  2. some hydrogen gas leaking out of the container
  3. increasing the volume of the container of hydrogen gas
  4. adding more hydrogen gas to the container without increasing the volume of the container

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 ____

Each of the three states of matter has mass. Explain with the help simple experiments – that each state of matter has mass.

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

Give a reason why –

Liquids have a definite volume but no definite shape.

State in which of the following examples ie. a piece of wood, water, light gas is the Inter-particle attraction maximum.

Complete the blank with reference to interconversion of matter on the basis of kinetic theory-with the word ‘increase’, ‘decreases’, ‘gain’, ‘lose’, or ‘overcome’ in the following case.

During soldification, the inter-particle space __________ gently.

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?


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