This document provides an overview of the classification and properties of matter. It discusses the following key points:
1) Matter is classified based on physical state (solid, liquid, gas), chemical composition (pure substances and mixtures), and early Indian philosophies.
2) Matter is made up of very tiny particles that are in continuous motion and have space between them. The particles attract each other.
3) The three states of matter (solid, liquid, gas) have different properties related to particle movement, volume, compressibility, and more.
4) Matter can change states through processes like melting, boiling, sublimation, and evaporation which involve adding or removing heat. Pressure also affects the
Chemistry is that branch of science dealing with the study of composition, structure, and properties of matter. It deals with the study of the changes which different forms of matter undergo under different conditions. Chemistry also had branches that look at the laws governing these changes.
The chapters in Organic Chemistry are important for NEET-UG. It carries high weightage in the exam.
lass 11
Chemistry Project on Green Chemistry – Biodiesel and Biopetrol.
Chemistry Project on Calculating the pH Balance and Change.
Chemistry Project on Quantitative Estimation.
Chemistry Project on Rusting of Iron.
Chemistry Project on Characterization and Purification of Organic Substances.
lass 11
Chemistry Project on Green Chemistry – Biodiesel and Biopetrol.
Chemistry Project on Calculating the pH Balance and Change.
Chemistry Project on Quantitative Estimation.
Chemistry Project on Rusting of Iron.
Chemistry Project on Characterization and Purification of Organic Substances.
lass 11
Chemistry Project on Green Chemistry – Biodiesel and Biopetrol.
Chemistry Project on Calculating the pH Balance and Change.
Chemistry Project on Quantitative Estimation.
Chemistry Project on Rusting of Iron.
Chemistry Project on Characterization and Purification of Organic Substances.
lass 11
Chemistry Project on Green Chemistry – Biodiesel and Biopetrol.
Chemistry Project on Calculating the pH Balance and Change.
Chemistry Project on Quantitative Estimation.
Chemistry Project on Rusting of Iron.
Chemistry Project on Characterization and Purification of Organic Substances.
DERIVATION OF MODIFIED BERNOULLI EQUATION WITH VISCOUS EFFECTS AND TERMINAL V...Wasswaderrick3
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Chemistry is that branch of science dealing with the study of composition, structure, and properties of matter. It deals with the study of the changes which different forms of matter undergo under different conditions. Chemistry also had branches that look at the laws governing these changes.
The chapters in Organic Chemistry are important for NEET-UG. It carries high weightage in the exam.
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Chemistry Project on Characterization and Purification of Organic Substances.
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2. 1a) Matter :-
Matter is anything which occupies space and has mass.
b) Classification of matter :-
i) Early Indian philosophers classified in the form of five
basic elements as air, earth, fire, sky and water called
Panch Tatva.
ii) On the basis of the physical state matter is classified as
solids, liquids and gases.
iii) On the basis of chemical composition matter is
classified as pure substances and mixtures.
Pure substances may be elements or compounds.
Mixtures may be homogeneous mixtures or
heterogeneous mixtures.
3. 2) Physical nature of matter :-
i) Matter is made up of particles.
ii) The particles of matter are very tiny.
iii) The particles of matter have space between them.
iii) The particles of matter are continuously moving.
iv) The particles of matter attract each other.
a) Matter is made up particles :-
Activity :- Take some water in a beaker and note its level. Dissolve
some salt or sugar in it with the help of a glass rod. The salt dissolves
in the water but the level of water does not change. This is because the
particles of water get into the space between the particles of water. This
shows that matter is made up of particles.
4. b) The particles of matter are very tiny :-
Activity :- Dissolve 2 – 3 crystals of potassium permanganate in
100ml of water in a beaker. Take 10ml of this solution and dissolve in
100ml of water. Take 10ml of this solution and dissolve in 100ml of
water. Repeat this process 5 – 6 times. This shows that a few crystals
of potassium permanganate can colour a large volume of water
because there are millions of tiny particles in each crystal.
10ml 10ml 10ml
I00ml 100ml 100ml 100ml
5. C) The particles of matter have space between them :-
Activity :- Take some water in a beaker and note its level. Dissolve
some salt or sugar in it with the help of a glass rod. The salt dissolves
in the water but the level of water does not change. This is because the
particles of salt get into the space between the particles of water.
6. d) Particles of matter are continuously moving :-
Activity :- Take some water in a beaker and put a drop of blue or red
ink slowly along the sides of the beaker. Leave it undisturbed for a
few hours. The ink spreads evenly throughout the water due to the
movement of the particles of water and ink.
The intermixing of two or more different types of matter on their own
is called diffusion.
7. e) Particles of matter attract each other :-
Activity :- Take an iron nail, a piece of chalk and a rubber band. Try
breaking them by hammering, cutting or stretching. It is more easier
to break the chalk, less easier to break the rubber band and difficult
to break the iron nail. This is because the particles in the iron nail are
held together with greater force than in the rubber band or chalk.
8. 3) States of matter :-
Matter exists in three different states. They are :- i) Solid ii) Liquid
iii) Gas
a) Properties of solids :-
i) Solids have definite shapes and fixed volume.
ii) The space between the particle is minimum.
iii) The force of attraction between the particles is maximum.
iv) The movement of the particles is minimum.
v) They are least compressible.
vi) Their rate of diffusion is least.
9. b) Properties of liquids :-
i) Liquids have no definite shape but have fixed volume. Liquids take
the shape of the container.
ii) The space between the particles is intermediade.
iii) The force of attraction between the particles is intermediate.
iv) The movement of the particles is intermediate.
v) They are less compressible.
vi) Their rate of diffusion is more than solids.
10. C) Properties of gases :-
i) Gases have no definite shape or fixed volume. Gases occupy the
whole space of the container.
ii) The space between the particles is maximum.
iii) The force of attraction between the particles is minimum.
iv) The movement of the particles is maximum.
v) They are most compressible.
vi) Their rate of diffusion is more than solids and liquids.
11.
12. 4) Change of state :-
When a solid is heated it changes into liquid. When a liquid is heated
it changes into gas.
When a gas is cooled it changes to liquid. When a liquid is cooled it
changes into solid.
Eg:- If ice is heated it changes into water. If water is heated it changes
into steam. If steam is cooled it changes into water. If water is cooled it
changes into ice.
Heat Heat
Cool Cool
Solid state Liquid state Gaseous state
13.
14. a) Melting (Fusion) :-
When a solid is heated, the particles begin to vibrate with greater
speed and begin to move more freely. Then at a particular temperature
the solid melts and changes into liquid. The process of melting is also
known as fusion.
The temperature at which a solid melts is called its melting point. The
melting point of ice is 00C or 273 K.
Latent heat of fusion :-
The amount of heat energy required to change 1kg of a solid into
liquid at atmospheric pressure at its melting point is called the latent
heat of fusion.
15.
16. b) Boiling :-
When a liquid is heated, its particles begin to move even faster.
Then at a particular temperature the liquid begins to boil and changes
into gas (vapour).
Boiling is a bulk phenomenon. When a liquid boils the bulk of the
liquid changes into vapour.
The temperature at which a liquid starts boiling is called its boiling
point. The boiling point of water is 1000C or 373K ( 273 + 100).
Latent heat of vaporisation :-
The amount of heat energy required to change 1kg of a liquid into
gas at atmospheric pressure at its boiling point is called the latent
heat of vaporisation.
17.
18.
19. c) Sublimation :-
The change of state directly from solid to gas or from gas to solid is
called sublimation.
Eg :- If solid camphor or ammonium chloride is heated, it changes
into vapour. If the vapours are cooled it changes into solid.
Ammonium chloride
Ammonium chloride
Ammonium chloride
vapours
Ammonium chloride
solidified
Inverted funnel
Cotton
China dish
Burner
20. d) Effect of pressure on gases :-
When pressure is applied on gas the particles come closer and the
gas changes into liquid.
We can liquefy gases by applying pressure and reducing the
temperature.
Compressed solid carbon dioxide is called dry ice. If the pressure is
reduced it changes directly to gas without coming into liquid state.
So solid carbon dioxide is known as dry ice.
21. 5) Interconversion of the three states of matter :-
The states of matter are inter convertible. The state of matter can be
changed by changing the temperature or pressure.
Solid
Gas Liquid
Vaporisation
Condensation
22. 6a) Evaporation :-
The change of a liquid into vapour at any temperature below its
boiling point is called evaporation.
Evaporation is a surface phenomenon. Particles from the surface
gain enough energy to overcome the forces of attraction and changes
to vapour state.
b) Factors affecting evaporation :-
The rate of evaporation depends upon surface area, temperature,
humidity and wind speed.
Increase in the surface area increases the rate of evaporation.
Increase in temperature increases the rate of evaporation.
Increase in humidity decreases the rate of evaporation.
Increase in wind speed increases the rate of evaporation.
23.
24.
25. c) Evaporation causes cooling :-
When a liquid evaporates, the particles of the liquid absorb heat
from the surroundings and evaporates. So the surroundings become
cold.
Eg :- People sprinkle water on the roof or open ground because
during evaporation water absorbs heat makes the hot surface cool.
During summer we sweat more because during evaporation the
sweat absorbs heat from our body making the body cool.
Wearing cotton clothes in summer keeps us cool because cotton
absorbs sweat and when the sweat evaporates it absorbs heat from our
body making the body cool.