2-butene is....... Of 1-butene
Correct answer: C. Position isomer
- A. Structural isomer
- B. Functional group isomer
- C. Position isomer
- D. Octane number
Explanation
Position isomers are molecules with the same molecular formula but different positions of functional groups or substituents. In the case of butane, there are two position isomers. One position isomer is 1-butane, where all four carbon atoms are in a straight chain. The other position isomer is 2-methylpropane (also called isobutane), where three carbon atoms are in a straight chain and one carbon atom is a branch. The branch is formed by attaching a methyl (-CH3) group to one of the carbon atoms in the chain. In summary, the correct answer is option C - position isomer, because butane has two position isomers: 1-butane and 2-methylpropane (isobutane).
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