Question

2)What is isomer? Explain with the example of butane.
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Answer 1

Answer:

Chain isomerism

These isomers arise because of the possibility of branching in carbon chains. For example, there are two isomers of butane, C4H10. In one of them, the carbon atoms lie in a "straight chain" whereas in the other the chain is branched.

Answer 2

Answer:

each of 2 or more compounds with same formula but different arrangement of atoms in molecule and different properties

Explanation:

C4H10