NCERT Chemistry Chapter 5 States of Matter Class 11th Notes PDF Download

states of matter class 11 notes

States of Matter Class 11 Notes:- States of matter is chapter 5 of NCERT book of chemistry. It is one of the most important chapters of the book with higher marks weightage in exams. To make your study more easier, we have made class 11 chemistry chapter 5 notes for all students. It will help them make their basics more stronger and score good marks in exams.

Chemistry is a chemical stream of science that is proposed concerning the “Central Science” as it interconnects topography, science, natural science, and certifiable science to each other. States of matter class 11 notes are very vital and of immense importance for the students preparing for their Class 11 Chemistry exam. Our class 11 chemistry chapter 5 notes clear the basic concepts of chemistry which helps to obtain higher marks in the Final examination. Students must refer to these specific notes for efficient exam preparation and they can also use these notes as revision notes for class 11 chemistry.

States of Matter Class 11 Notes

The intermolecular forces run between the particles of the issue. There exists a pure electrostatic force between two particles that are oppositely charged. The intermolecular forces are not as old as pure electrostatic forces.

 Choosing the state of the issue is done by the resistance between intermolecular interchanges and atomic force. Various properties of the issue in mass, similar to a change of state, qualities of liquids and solids, gases direct depend upon two factors:

 •       The participation type between them.

 •       The energy of constituent particles.

The distinction in-state doesn’t impact the manufactured properties of a substance, yet the change of the real state impacts the reactivity.

What is Matter in Chemistry?

 As found by scientists, the matter is involved in uncommonly little particles and these particles are pretty much nothing, to the point that we can’t see them with independent eyes.

It has been seen that matter exists in nature in different constructions. A couple of substances are unyielding and have a fair shape like wood and stone; a couple of substances can stream and take the condition of their compartment like water, while there are sorts of issues that don’t have an obvious shape or size like air.

In this manner, matter can be assembled into different characterized subjects to the real properties displayed by them and the states in which they exist; these are called states of issue.

 Following are the basic three states:

  • Solid
  • Liquid
  • Gas

 Besides the recently referenced three, there are 2 extra states of issue that we don’t discover in our customary everyday presence. They are Plasma and Bose-Einstein condensate.

 Changes in the characteristics of the issue are related to external effects, for instance, pressure and temperature separate states of the issue. A discontinuity in one of those attributes frequently perceives states: rising the temperature of ice, for example, makes an inconsistency at 0 °C (32 °F) as energy streams into stage progress rather than temperature rise.

Matter Definition Chemistry

Science is the examination of the blend of the issue and its change. One more term routinely thought to be indistinguishable from the issue is substance, yet a substance has a more limited definition in science. Science deals with the examination of the lead of – matter Chemistry is stressed over the – course of action, development, and properties of issues and the miracle which happens when different sorts of issues go through changes.

 Matter hypothesis covers the changing musings and systems that were used to depict and explain the material world. An enormous piece of issue hypothesis relied upon a theory of the parts.

Boyle’s Law

 Charles’ Law communicates that the volume of a given mass of gas is directly compared to them through and through temperature at a consistent pressure. It is imparted as PV = k where P is pressure, V is volume and k is consistent. This law is in like manner insinuated as the Boyle-Mariotte law or Mariotte’s law.

What is Boyle’s Law?

 Boyle’s law is a gas law that communicates that the strain applied by a gas (of a given mass, kept at a consistent temperature) is conflictingly related to the volume required by it. All things considered, the strain and volume of a gas are on the other hand comparative with each other as long as the temperature and the measure of gas are kept predictable. Boyle’s law was progressed by the Anglo-Irish researcher Robert Boyle in the year 1662.

 For a gas, the association between volume and strain (at reliable mass and temperature) can be conveyed mathematically as follows.


 Where P is the pressure applied by the gas and V is the volume required by it. This proportionality can be changed over into a circumstance by adding a steady, k.

 P = k*(1/V)  PV = k


 As per Boyle’s law, any change of the volume required by a gas (at a steady sum and temperature) will achieve a change of the strain applied by it. All things considered, the aftereffect of the hidden pressure and the fundamental volume of a gas is identical to the consequence of its last strain and last volume (at consistent temperature and number of moles). This law can be imparted mathematically as keeps:

 P1V1 = P2V2


  • P1 is the basic strain applied by the gas
  • V1 is the basic volume required by the gas
  •  P2 is the last strain applied by the gas
  • V2 is the last volume required by the gas

 This explanation can be obtained from the strain volume relationship proposed by Boyle’s law. For a legitimate proportion of gas kept at a predictable temperature, PV = k. Consequently,

P1V1 = k (early on pressure * beginning volume)

P2V2 = k (last strain * last volume)

Therefore, P1V1 = P2V2

 This condition can be used to anticipate the development in the strain applied by a gas on the dividers of its compartment when the volume of its holder is lessened (and its sum and out and out temperature stay unaltered).

Charles’ Law

Charles’ Law communicates that the volume of a given mass of gas is conflictingly relating to the inside and out strain at a consistent temperature. It is conveyed as V/T = k where V is the volume of gas, T is the temperature of the gas, and k is consistent. The temperature is assessed on the Kelvin scale. This law has also been named the law of volumes.

The Significance of Charles’ Law

In 1787, the French scientist Jacques Charles tracked down that the volume of a gas varies when we change its temperature, keeping the strain reliable. Thereafter, in 1802, Joseph Gay-Lussac changed the thought given by Charles and summarized it as Charles’ law. Gases submit to Charles law at an incredibly high temperature and low strain.


  The volume of a fair mass of a gas decay by cooling it and growing by extending the temperature. For one degree climb in temperature, the volume of the gas increases by 1273 of its interesting volume at 0˚C. Let the volume of the gas at 0˚C and t˚C be Vo and Vt independently”.

Then, VtVt = Vo+t273.15VoVo+t273.15Vo                                 ……….. (i)

VtVt = Vo(1+t273.15) Vo(1+t273.15)                            ……….. (ii)

VtVt = Vo(273.15+t273.15) Vo(273.15+t273.15)                      …………  (iii)

 At present, we would now have the option to give out one more scale for temperature where the temperature in Celsius is given as t = T – 273.15 and 0˚C can be given as to = 273.15. This new size of temperature (T) is known as the Kelvin temperature scale or Absolute temperature scale. The degree sign isn’t made when a temperature is written on the Kelvin scale. It is generally called the thermodynamic size of temperature and it is by and large used for every sensible explanation. Thus, when we truly need to make temperature on the Kelvin scale, we add 273 to the temperature in Celsius.

Let’s take  T = 273.15 + t

To = 273.15

Then equation (iii) can be written as

VtVt = Vo (TtTo)Vo (TtTo)

Or, (VtVo)(VtVo) = (TtTo)(TtTo)

 We can write it as general

(V2V1) (V2V1) = (T2T1) (T2T1)

Or, (V1T1) (V1T1) = (V2T2) (V2T2)

  • ⇒VT⇒VT = constant = k2k2.

Thus, VV =k2Tk2T.

The value of k2 insists on its amount and also on the unit of volume V depending on the pressure of the gas too.

Graphical Depiction:

At a legitimate strain, when the volume has varied, the volume-temperature relationship follows a straight line on the diagram, and on moving towards zero volume all lines cross at a point on the temperature center which is – 273.15˚C. Each line in the chart of volume Vs temperature is known as isobar (Since pressure is consistent). The most un-speculative temperature of – 273˚C at which a gas will have zero volume is called Absolute Zero.

Also Read:- Class 11 Chemistry Syllabus

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States of matter class 11 notes or class 11 chemistry chapter 5 notes guides the young brimming and talented Chemistry students with basic concepts of Chemistry to get the concept clear of Chapter 5 for obtaining a high rank in the Final examination. Students must read states of matter class 11 notes to score good marks in their upcoming examination of 2021-22. The qualified Science Faculties of Vidya Setu assure 100% cooperation to students. For inquiry, you may call VIDYA SETU at +91 78218 21250 for sharing the concepts with amazing solutions.