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Class IX : Chemistry

Chapter: Matter in Our Surroundings

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Objectives

To understand the nature of matter: o is it continuous or particle ? o has it space inside it ? o what is the size of these particles? o are these particles moving? o does it have force of attraction? Understand the terms Kinetic energy and diffusion. Classification of matter as solid, liquids and gases and understanding and differentiating their properties. Are these three states of matter inter-convertible? Understand what is melting point of a solid and its latent heat of Fusion ? Understand what is boiling point of a solid and its Latent heat of Vaporisation? Understand what is sublimation? To understand the effect of pressure on a gas. To understand the process pf evaporation and the factors affecting the rate of evaporation.

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