The organic compounds which have same molecular formula but their structural formula is different is known as Isomerism.
The four characteristics of isomerism are as follows:
(i) They possess same molecular formula but different structural formula.
(ii) In Isomerism, the two or more different compounds can be represented with the same molecular formula.
(iii) The isomers of the given molecular formula have different properties.
(iv) The phenomena of Isomerism occurs only when the hydrocarbons contains four or more than 4 carbon atoms.
The various isomers of Butane C4H10 are as follows:
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