Question

why chain isomers are also known as skeletal isomer​

Answer 1

Two chemical in this isomerism have the same molecular formula, but the molecules have bonded together in different orders. ... They are skeletal isomers, positional isomers, andfunctional isomers. Positional isomers are also called regioisomers. 
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Answer 2

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Two chemical in this isomerism have the same molecular formula, but the molecules have bonded together in different orders. ... They are skeletal isomers, positional isomers, andfunctional isomers. Positional isomers are also called regioisomers. 

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