Question

what is structural isomerism?draw isomers of pentane

Answer 1

The phenomenon in which Two or more compounds having same molecular formula may exist with different structural formulae is called isomerism. The different structures are given in the picture above.

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Answer 2

H. H. H. H. H.
|. |. |. |. |.
H ---C --- C --- C ---C --- C --- H
|. |. |. |. |.
H. H. H. H. H

Pentane (1)

H. H
\. /
H C. H
| /. \ |
H --- C. C --- H
|. |
H --- C ------ C --- H
|. |
H. H.
Pentane (2)