What is Inter-conversion of Matter. Give the Meaning of the Terms Involved in Inter-conversion of Matter (A) Melting (B) Vaporisation (C) Liquefaction Or Condensation, (D) Solidification Or - Chemistry

Advertisements
Advertisements
Answer in Brief

What is inter-conversion of matter. Give the meaning of the terms involved in inter-conversion of matter

(a) Melting
(b) Vaporisation
(c) Liquefaction or condensation,
(d) Solidification or freezing
(e) Sublimation.

Advertisements

Solution

INTERCONVERSION OF MATTER :

“Change of state of matter from one state to another state and back to its original state is called inter-conversion of matter.”

(a) MELTING: Conversion of a solid into a liquid on heating e.g. ice to water.

(b) VAPORISATION: Conversion of a – liquid into vapours (or gas) on heating e.g. water to water vapour.

(c) LIQUEFACTION or CONDENSATION: Conversion of VAPOUR (or gas) into a LIQUID on cooling e.g. water vapour to water.

(d) SOLIDIFICATION OR FREEZING: Conversion of a LIQUID into a SOLID e.g. water to ice.

(e) SUBLIMATION: Conversion of a SOLID directly in GASEOUS (vapour) state and on cooling directly back to SOLID e.g. Naphthalene sublimes at room temperature.

  Is there an error in this question or solution?
Chapter 1: Matter - Exercises

APPEARS IN

RELATED QUESTIONS

What is the physical state of water at 250°C.


What is the physical state of water at 100°C.


What do you mean by the change of state? Write the flow chart showing the complete cycle of change of state.


Mention a change which is always


What do you observe when :

ime is dissolved in water.


State whether the following is physical or chemical changes.

heating of water —


Tick (√) the correct alternative from the choice given for the following statement.

When we add water to the following substances, which one will show a chemical change?


Tick the most appropriate answer.

Melting of ice is a


Tick the most appropriate answer.

Chemical changes involve


Dissolving salt in water is a reversible change.


Ripening of fruits is a desirable change.


How do you say that the process of digestion is a chemical change ?


A few substances are arranged in the increasing order of 'forces of attraction' between their particles. Which one of the following represents the correct arrangement?


The boiling point of alcohol is 78° C. What is this temperature on Kelvin scale ?


Name one common substance which can be easily changed from one state to another by heating or cooling.


Why is solid carbon dioxide known as dry ice ?


Fill in the following blank with suitable words :

Scientists say that there are actually five states of matter : solid, liquid, gas,  .................... and ...................


Explain why, there is no rise in temperature of a substance when it undergoes a change of state though heat is supplied continuously.


If the temperature of an object is 268 K, it will be equivalent to :


On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be :


What do you observe when: little amount of curd is added to a bowl containing warm milk and kept for five hours.


Define: Brownian movement


Define the following terms: Diffusion


Define the following terms: Boiling point


Differentiate between: Melting and boiling 


What happens to a metal ball when it is heated? What does this show?


Fill in the blanks:

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


A kind of matter which can sublime is


Explain the term freezing


Explain the term melting point


State if the following is a physical property of a substance.

Lead chloride reacts with barium sulphate to give a white precipitate of lead sulphate.


Discuss.

Riya pours some water from her bottle into another bottle. Does it change the shape of the water?


What is it made from? Why?

A sickle to cut sugarcane.


What is it made from? Why?

The sheets used for roofing.


What will happen if....? And why?

A bell is made of wood.


What will happen if....? And why?

Rubber is not fitted on a pair of tongs.


What will happen if....? And why?

A knife is made of wood.


What will happen if....? And why?

An axe is made of rubber.


Who am I?

I dissolve in water, but not in kerosene.


Why does this happen?

Kerosene left open in a dish disappears.


Why does this happen?

What you see in the picture.


Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.

Can the change be reversed or is it irreversible?


State whether the following statement is true or false. If false write the correct statement.

Desirable changes are meaningful, while undesirable changes are unfavourable.


State whether the following statement is true or false. If false write the correct statement.

During physical changes, the composition of the original substance is not altered, but the properties of the original substance are altered.


State whether the following statement is true or false. If false write the correct statement.

During a chemical change the composition of the original substance is not altered and the change is irreversible.


Fill in the blank with the correct word of the statement given below:

Sublimation is _______ a change of state of matter.


Fill in the blanks with the correct words of the statement given below:

During sublimation, a solid on heating turns directly into _________ and on cooling back to __________.


Matter in any state is composed of small particles – molecules, atoms, or ions. Differentiate the terms above in Italics.


State which of the three states of matter Le. solids, liquids or gases – have

(a) No definite volume
(b) A definite shape
(c) High density
(d) No free surfaces
(e) Particles – which diffuse very easily.


Draw a labelled schematic diagram representing the terms (a) to (e) involved in the inter-conversion of matter.


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

On heating, the liquid, do the particles gain or lose energy.


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

The heat energy supplied to the liquid is absorbed by its molecule & stored as which form of energy.


Complete the statement by filling the blank with the correct word given below.

Conversion of vapour [or gas] into a liquid is termed ____________.


Give the reason for the following: 

The kinetic energy of molecules of gases is very large & of solids, the least.


Give the reason for the following 

On heating a sublimable solid, the molecules break free & escape from the surface of the solid directly into vapour.


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 following case.

During the melting of solids, the inter-particles space __________.


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 vaporization, the liquid particles ____________ energy.


Share
Notifications



      Forgot password?
Use app×