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F unctional group is an atom or group of atoms in a organic molecule that predicts or identifies the characteristics chemical and physical properties of  organic molecule.In short functional groups determine the identity of organic molecules Explanation: Functional groups are very important in organic chemistry since they are used to determine the type these molecules and therefore, depict the  of them. For example,  Hydroxy groups O H , is specific for alcohols. the general structure for alcohols is R − O H .  In a similar way,   C O O H is the functional group for carboxylic acids with a general structure R − C O O H . For esters, the functional group is C O O R ' , where esters have the general structure R − C O O R ' .   And so on. with different functional groups, alcohols, carboxylic acids, and esters have different chemical and physical properties and therefore, different identity. Importance of Function...

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As its name implies ,Mother board is the board on which all the components of computer are attached i.e The three Basic systems that are attached on mother board are: (i)Processing Units i.e CPU,micro processors ,etc (ii)Memory Units: i.e  RAM, ROM, Hard disk and other disk drives. (iii)Power System,which provide power connections to all the components of the computer through motherboard etc.

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