Name out the characteristics of Matter.
1. volume- The matter must occupy space, the space occupied by matter is called volume. |
2. Mass- It represents the quantity of matter , which can be found by physical balance.. |
3. Weight- It represents the pull of gravity, which can found by spring balance. |
4. perception by physical senses- It is preceived by our physical senses, eg the sense of touch, sense of hearing etc. |
Explain Kinetic Theory of matter
The main postulates of this theory are- |
1. All matter is composed of small particles called molucules |
2. The particles are in a state of unending motion or continuous motion, hence they have kinetic energy. |
3. With the supply of heat energy the kinetic energy of the particles increases and they start moving more vigorously, reverse happens when the the matter is cooled. |
4. The particles attract each other :) always, which can be cohesive ( if particles r of same kind) and adhesive ( if particles are of diffrent kinds) |
5. The force of attraction between the particles decreases if the intermolecular space, decreases and vice versa. |
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What are materials , name the kinds of material?
The term used for particular kind of matter is called material. |
1. Homogenous materials: The materials which have the same composition and same properties throughout. |
examples- pure common salt, and common salt solution |
2. Heterogeneous materials- the materials which have different compostions and different properties in their different parts |
examples- Marble rock, muddy water |
solid on the basis of kinetic theory of matter
The definite shape and definite volume of solids can be explained on the basis of kinetic theory of matter. |
In case of solids the kinetic energy of molecules is least and the force of attraction between the molecules is maximum. |
The molecules of solids, can vibrate from their mean position but cannot migrate from one position to another. |
Examples of solids- wood, brick, logs, ice etc. |
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What is a substance? give an eg with NACL
A homogenous mixture which is made up of only one kind of atoms is called substance*. |
example- sodium chloride is a substance cuz it has 23 parts of sodum and 35.5 parts of chloride by weight in its composition. |
similarly, pure alcohol, pure water, pure gold and silver are substances |
Liquid on the basis of kinetic model
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