Sudhanshu

Get the Power of Visual Impact on your look log on to www.topperlearning.com 1 Class XII: alchemy Chapter 1: The red-blooded State Concept 1. unhurt: inviolable is a state of matter in which the constituting particles ar staged very closely. The component part particles can be atoms, molecules or ions. 2. Properties of solids: a. They tap decided mass, volume and shape. b. Intermolecular distances atomic number 18 short and therefore the intermolecular forces atomic number 18 strong. c. Their constituent particles fall in intractable positions and can only waver about their mean positions. d. They are incompressible and rigid. 3. Classification of on the basis of the ar catment of constituent particles: a. Crystalline solids: The arrangement of constituent particles is a rule-governed nifty arrangement. Example: iron, copper, diamond, black lead b. Amorphous solids: The arrangement of constituent particles is an minute arrangement. Example: Glass, plastics, rubber 4. Properties of crystalline solids: a. They have a definite peculiar(prenominal) geometrical shape b. They have a long range order. c. They have a nipping melting point. d. They are anisotropic in nature i.e. their physical properties show different determine when measured along different directions in the same crystal. e. When tailor with a sharp edged tool, they split into two pieces and the newly generated surfaces are seemingly and smooth.

f. They have a definite and peculiarity heat of fusion g. They are called true solids 5. Polymorphic forms or polymorphs: The different crystalline forms of a cognitive content are known as polymorph! ic forms or polymorphs. For exercising: graphite and diamond. Get the Power of Visual Impact on your perspective Log on to www.topperlearning.com 2 6. Types of crystalline solids: Type of Solid Constituen t Particles Bonding/ Attractive Forces Examples Physical nature electric conductivity Melting point Molecular solids 1. Non polar Molecules cattle farm or London forces Ar, CCl4,...If you want to get a adept essay, order it on our website: BestEssayCheap.com

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